Look, if you're not interested in a topic, don't interject with your pointless noise. Go and read something else.
Now, if big wheels were default, would small sizes have been tried? Definitely. Would they have taken off big time? Maybe not. As a mass market product, it might have been hard to sell, “slower, trickier, livelier, more involved.” Unless of course BMX was cool at the time that the introduction was tried. Hard to tell, as would have to be sold on something other than measured performance I expect. Which is odd, because in reality, most riders just ride for fun, not for timed runs.