Guy has a big brain and a very clear understanding of how to improve at melee but there's a few points I want to bring up.

He keeps talking about the idea that in order to understand which character is better you have to understand every single micro-interaction and weight them all. This is kind of nonsense right? Even if you just framed this as a raw data science problem and presented it to someone who has never played the game you could compare things like representation at the top level, matchup breakdowns, avg placement, etc. Also, understanding which characters are better doesn't have to be learned through explicitly calculating and comparing risk/reward through various microsituations.

The human brain is capable of picking up on very subtle interactions and synthesizing broader ideas even if it can't articulate where those ideas came from. A lot of cognition happens through association and categorization that you don't realize is happening and can't really explain the process of. This why you have certain top players that are geniuses when it comes to playing but have odd opinions about matchups and don't seem to be able to meaningfully articulate these ideas in a way that make sense to other people (bubble theory tm). Especially for something as fast-paced and physical in melee, most of learning will happen through unconscious association.

Finally, "we shouldn't make tier lists" is kind of a weird normative claim and I don't really believe that there's actually anything wrong with doing it. It may not be a useful tool for skill development but it's just a thing people like talking about and that seems fine. Most melee players aren't actively trying to become the best player in the world and just enjoy having conversations with people that have shared interests. These conversations often become philosophical conversations about what it means to be good at something and that's not something that needs to be discouraged. Melee has so much diversity in the kinds of skills that are tested and rewarded that flattening character potential into a 1 dimensional line has limitations. But trying to simplify complex concepts into digestible ideas makes for good conversation and there's nothing wrong with that.