Ok, I'm old compared to most of you folks... but, I don't think you should lump us all together under any sort of stereotype... there's some willing to learn and others are idiots - but that comes with every generation.
I also have to admit that I bought my bettas because I felt bad for them, and didn't have the right set-up for keeping them happy. I was ill-informed that they'd get along in small quarters, but I've been learning from here, and lots of trial and error.
I now feel really guilty using my 2 gallon tanks, they're a last resort for mis-behaviors or sickness. Now that I've seen the sheer bliss that my girls have in the 20 gal. I can't deny them this freedom.
Sure any small fish can 'survive' in a clean one gal (or less?) - but it doesn't mean happy living.
Sure, a one gallon bowl is better than that miserable excuse of a cup that the poor darlings are sold in - but who among us would like to resort to being able to walk 4 steps in any direction to touch a wall - that's what a one gallon tank is to a betta.
It's easy to watch a fish and count the number of tail strokes it takes for it to circumnavigate its tank. Is it happy going around in mini-circles?
Since I'm an old person - UGH (hate saying that) - I'll relate a tidbit of memory from my childhood. When my dad would get stressed out or worried, I'd hear him pace around the kitchen table, round and round and round.... and when I think of tiny fish bowls - I'm reminded of the image of my dad doing that. But at least he had other rooms to pace in, and could leave the house ...