I know, but that one makes sense to me at least -- that is powerful enough and inaccurate enough to be a risk/reward type of scenario, especially on a type that is very potent offensively; not to mention it fits flavour wise with how clumsy living rock monsters chucking big lumbering stones would presumably be. Not saying I like it, but I get it.Not anywhere as bad as physical Rock moves, at least. The only physical rock moves with 100% accuracy are Accelrock(Quick Attack clone exclusive to Lycanroc) and Smack Down(50 power with a weird secondary effect). Even moves of comparable power, like Rock Tomb and Rock Throw, have imperfect accuracy(interestingly in both cases they had much worse accuracy in their debut games, with 80% and 65%, respectively.) You know it's bad when even your early game moves can miss, at least with Flying that is not a problem.
But 90/95% accurate is... well, as said before, just not low enough for a high risk/high reward type thing, especially with moves as 'meh' in power as Air Slash, and for moves that already have drawbacks like Fly. And I have no idea how this is supposed to fit the flying-type, which is presumably meant to evoke ideas of agility and speed and acrobatic prowess in the sky; something that's matched by most Pokémon who have the type especially in earlier gens.