Looks really only matter when in high school if you're trying to find someone to date. I'll be honest, my face is not exactly what I'd want it to be (particularly my eyes; they're not as wide as I want, which sucks because I actually have good eyes), so I really have no luck there. Honestly, it's harder in life not being very attractive, so sometimes showing sexy face has its advantages. Just know that it shouldn't run your life and will never affect your long-term goals unless you plan to go into a career that centers around looking good. A lot of unattractive people have become extremely successful (Mark Zuckerberg, Steve Jobs, etc.) and their appearance surely didn't hinder them.
Now, on-topic: businesses rarely care about how someone looks unless they have to interact with people in some way. Ignoring the modeling/acting thing, it's almost a standard that attractive people are usually hired to work around social environments. People who run well-paying (read: well) counter jobs, like lobby secretaries or clothing store cashiers, are usually expected to be moderately attractive in some way because it appeals to customers to talk to a pretty face. Now, would you find an extreme hot girl working at a supermarket? Possibly. But it's less likely because it's a completely different environment. Somehow, someway, the human brain associates professionalism with attractiveness. They expect a respectable business to employ good-looking people and minor public businesses, like supermarkets or obscure clothing stores, to employ less-attractive workers.
Now, is that really a good thing? Probably not. But it doesn't always apply to everyone. Being attractive does not equal success. Success can only be achieved through hard work and being well-rounded at whatever you do. Maybe you won't have it as easy as that cute executive, but if you're really amazing at your job, you'll get recognition. If that doesn't happen and you're positive you've helped your employer/company significantly, it's time for a new job.
Hence point, don't base your whole life on looking good, because good looks only go so far if you can't do anything useful for others or yourself. Period.