There's a saturation point to what you're actually able to do in matchups. The end result determines how good each player is, not the actual options that make the match in question happen.
For example, if MK play X and Wario player Y go even, the Wario player is either a better player, and knows the matchup better, or the MK player doesn't know the matchup well, and isn't as good a player.
However, assuming the MK player is up to a certain par, increases in the skill of the wario player have less and less effect, because no matter how well you space against MK, your ability to actually punish is limited if MK reacts safely to your approaches.
We're not gonna argue about this. But Glutonny is definitely WAAAAY better than me. He just uses a worse character. Have you seen Glutonnys Falco compared to his Wario? Falco is a much easier character to apply, so his Falco looks absolutely absurd. Wario has a saturation point in how much reaction/technicality will increase the characters ability to bait punish. Imo Glutonny using Wario is actually a waste of skill, but the character being very demanding probably means he doesn't have to play anywhere near 100% of the time.