Ovinomancer
No flips for you!
You're missing the point. If I'm playing a grim and gritty game like Torchbearer, the idea that a whimsical Hitchhiker-esque flying scheme (HFS) is even genre appropriate is what I'm talking about. Similarly, a given D&D game may or may not allow HFS due to the agreed upon genre expectations. This "check" is not an application of game mechanics, so it's not Rule Zero, it's part of the basic agreement to even play.Anything can happen. It's a game. (Thanks @Aldarc.) For example, you can cast magic missile even if there's nothing to attack:
My copy of Zweihaender (admittedly, an old one) says that a skill test should be rolled "any time an action is attempted." But you shouldn't roll a skill test if there's no dramatic consequence for failure. Since throwing one's self at the ground could be both hilarious and crippling, I'd call that dramatic. Given the game's attention to injury detail (and its dark nature in general), I can't say with certainty that I would try to fly in it!
The point is that your suggestion isn't just a matter of mechanical interpretation, but also the broader genre agreement the exists around the game. This only seems to be a point of contention because you seem to be pushing that a mechanical exploit to allow HFS is broadly universal. I contest that it's not -- it requires genre agreement first, mechanical adjustment second. If you've already made the genre agreement becessary for HFS, I don't think you're going to be stymied by pesky game mechanics.
In other words, you aren't really asking people to consider the mechanics, but instead adjust their genre expectations. This is why you have some agreement and some hard pushback.