I think this shows a similar idiosyncrasy to mine with roll-under. There's acknowledgement that it's not born of logic, but perception/familiarity.
There's talk of agendas and creative goals and such - all rather conscious/pro-active language - but I think not enough weight is given to subconscious quirks. It sort of gets touched on and glossed over with "preferences", ostensibly because there's not much to dissect there without getting deep into psychology instead of game design.
I think the pushback on roll-under has multiple factors. We generally think that higher numbers are better. Obviously they aren't if you're talking about cholesterol, but for most of our daily interactions and especially with games high is good. Maybe you never played TSR era D&D where sometimes high was good sometimes low was good but for quite a few people it was a bit counterintuitive that rolling low was what you wanted. Then of course we get into things like THAC0 which was even more unintuitive for some.
So I wouldn't discount basic psychology when it comes to people preferring roll over instead of under. On the other hand, we are all influenced and shaped by past experiences. I tend to wear work or hiking boots most of the time because I find them comfortable. I find them comfortable because I grew up on a farm where walking around in mud and other mucky substances or tromping around in snow was just normal. Meanwhile if I go jogging I'm putting on running shoes. I grew up with pickups so I don't see why anyone finds them appealing unless you need to haul heavy stuff on a regular basis. I don't have any music from my high school or college years on my main Spotify channel.
People are complex and saying we are shaped by our experiences is stating something that should be obvious. Meanwhile, I happen to prefer D&D's approach to the game ... and I don't think it really matters how I got here and I don't see why anyone else would care as long as they can find something that suits them better.