I don't think that people are "jealous" that they can't RNG abuse. I'm sure that kirk has the intelligence to look at the thread in Smogon about RNG abuse and learn how to do it to get all the shinies he wants. From my knowledge, those that are against RNG abuse are shiny hunters who value shinies for the dedication it takes to get them.
Aside from learning how to RNG abuse, (I cannot say I know how hard/easy it is to learn, I've never attempted to figure it out) I don't think it takes as much dedication to get a shiny through RNG abuse as it does to, say, soft reset, breed, or chain for a shiny. RNG abuse eliminates the effort (and, admittedly, the luck part as well, because you can get lucky with shinies) component of obtaining shinies.
What seems to be the issue is that the two opposing parties are trying to draw parallels between the two shinies. Other than the shinyness of RNG abused shinies and regular shinies, we are trying to assess and compare the values of each, which, in my opinion, really shouldn't be done at all. Views concerning RNG abuse differ from person to person.
What I'm trying to say is that the regular shiny hunters normally get shinies with poor natures and crappy IVs. On the other hand, RNG abused shinies can have awesome IVs, egg moves...anything and everything, really. But once you think about it, yes, they're Pokemon, but from an effort vs. reward (I really don't know how else to describe it) perspective, they're not the same. The shiny hunters hunt for shinies for the sake of having them, NOT for their competitive prowess. Those who RNG abuse probably want Pokemon to be as competitively viable as possible; thus, the shinyness of a Pokemon to them is nothing more than an extra option to make their pokemon "cooler" (after all, most people would rather look at a shiny than a normal Pokemon, aside from crap like Garchomp :))
As an aside, I really wish there was another name for the exploit besides "RNG Abuse". The name alone already carries a negative connotation with it, and I believe that this contributes to its stimga among people who hate or disapprove of RNG abuse.
Going back to the effort vs. reward argument, it seems to me like shiny hunters in general are indeed a bit angry...I mean, they normally put in high effort to get shinies that end up being relative crap. But then, RNG abuse comes along, and anybody who knows how to do it is rewardly heartily with perfect nature/IV'd shinies, despite the fact that the effort put into RNG abusing for one shiny is probably less than that put into obtaining a normal shiny. It's almost like the psychological maxim of the "Just World Fallacy"; we believe that good things happen to good people, and bad things happen to bad people. Similarly, shiny hunters think that their countless hours of searching should be rewarded with at least partially decent shinies, yet RNG abusers (who are "the bad" in their eyes, I would assume) get the best of the best. In their opinion, "the good" are stuck with...well, crap, for the most part.
However, that's where the problem lies; the world doesn't work like that. In the end, shiny hunters have to realize that they're playing with astronomical chances; like people say, if there are 8192 balls in a box and only ONE of those balls contains a shiny pokemon, the odds of getting the shiny are incredibly low (and to be even more realistic, there's no guarantee that ANY of those pokemon are shiny, this is probability after all). It's somewhat foolish for the shiny hunters to be mad that their shinies have bad natures/IVs because that's not what they're aiming for in the slightest sense; in my opinion, they should just be happy with their shinies.
Those that want Pokemon that are both shiny and competitively viable should just stick to a method that requires much less frustration, a method that consistently produces desirable results. Regular shiny hunting is not that method. RNG Abuse is.
Damn, this is a long-*** post, I didn't even mean for it to be like this. o_O Anyways, I guess for those that are thinking tl;dr and just scrolled to the bottom of my post, at least read this:
RNG Abused shinies and regular shinies are fundamentally different. RNG Abused shinies are desired for the fact that they can manipulated into nearly anything the player wants, which allows for an unparalleled amount of customization. On the other hand, the value of non-abused shinies stems from the blood, sweat, and tears that one often goes through to obtain his or her most sought-after prize. Their worth is directly equated to effort.
As such, the roles of RNG abused shinies and regular shinies are different and separate. Yes, technically, they're both shinies -- but their unique qualities, specific to both abused and non-abused shinies, are what make them coveted throughout the Pokemon community.
And for the record, I used to be against RNG abuse for shinies. Now, however, I do consider them to be legitimate shinies. They just don't have the same value to me as regularly obtained shinies. I am not against RNG Abuse anymore, either, but I doubt I'll ever have the patience or desire to learn how to do it, either.