The main thing that makes top level Wario players harder to grab than the lower level ones is that they buffer jumps out of everything they do, meaning you have like 4 frames to grab them. However, the same Wario players will know your grab range and thus space away from it. Add to that the fact that Wario's nair is very low in delay and can be activated right as he hits the ground and you'll be hardpressed to get the grab (it's hard for even entirely grab centric characters that can grab Wario out of almost all his aerials/jumps like D3 and ICs). Wario's standing grab is deceptively long, and when buffered on landing he gets a little extra slide. I know Falcon isn't slow in the air, but he's certainly not going to CATCH Wario in the air (since, as you guys just pointed out, he's slower than Wario on it). Also, when your only good tool on our character is grab, do you know what we're going to make sure to bait and punish you for (which we do amazingly due to our aerial acceleration and movespeed which allows for crossups or feigned approaches)? Your grabs.
Nair gimps Falcon, hard nair has a fairly horizontal trajectory and weak nair hits falcon out of UpB startup (as does fair). Wario can hit Falcon all the way to the blast zone and then bike up to safety. Gimping him isn't hard. Only good thing about this matchup for you guys really is that since grab is dangerous, you won't have to worry about much, if any, fsmashes, which do 21% a pop. Your priority is garbage, while Wario has one of the highest ground priorities around.
The reason I said it's not worth it to argue is b/c for whatever reason low tier mains always like to overrate the matchups in their favor, so I've just stopped caring about them (take Salem as an extreme example).
