The supply shortages were only a major issue at launch (like all new big name tech), and although they still exist to a smaller degree, that doesnt warrant 75% less sales. I might also add that the 3DS had a similar supply issue at launch.
And don't forget, the switch games are a few years away, by that time it will have sold much more.
The comparison was for sales over the same time period, being pre-orders plus two quarters of sales. Nintendo's sales estimates (prior to launch/supply problems) were 20m units sold by Q2 2018, compared to the 31m 3DS units sold over the same period.
The 5m switch units sold, compared to the 67m of the 3DS should force GF to not develop for the switch until it has a much larger user base. Sales would be severely limited, lowering revenue, coupled with the costs of developing for the new system, lowering profits. From a monetary standpoint, GF should not be making a switch exclusive game for at least another development cycle.
I have a Switch, and would love to have a main series game on it, but im just being realistic. I wouldnt mind some of the more obscure Pokemon titles i.e. Pokemon Ranger being released, as it wouldnt be as risky as making the main series Switch only.
EDIT: I might add that GF is a company, their only goal is to make money, not to innovate for the sake of innovation. Selling on the switch only would be a terrible buisness choice. It is only a vocal minority of fans who want games on the switch, as the switch user base is currently a minority in the Nintendo ecosystem.
