1) Steam simply doesn't have the same breadth and depth of artistic - sorry, everyone seems to get stuck on that word so let's go with "noncommercial" - games as itch does. Everything on there is just to be sold. There's very little on there made to experiment with the genre or made just for its own sake. And what's this about games "actually working" here on itch more than Steam? There are games here that are hardly even built, and that's part of why the platform is great for creators. That's not a relevant point, and it's wrong.
2) Descriptions and screenshots help me decide what a game is. They don't help me wade through the hundreds of results and figure out from a glance whether something is made to be a fun few-hour adventure, or some experiment with tech or game design, some punk trashgame that's just meant to make a specific few people feel something. Most people do not spend a minute looking at each game, they scan.
3) I am not assuming, I am speaking from experience, from the experiences other people have conveyed to me, and from the fact that if I ever manage to convince someone to look at itch instead of Steam, they go back immediately. You are a moderator. Your personal experience of how you use the search and browse simply does not line up with newcomers. I've been using itch for a while and even my experience doesn't seem to line up with yours - I cannot easily find the games I want because of exactly the problem this whole thread is about. I'm not assuming, I'm not lying, I am telling you exactly what I have experienced.