Solo Queue Comp. Does Win Rate matter?

I’m new to these types of games. Never played overwatch. Genuinely curious why WR matters.

I’m a Sue main. I solo queue comp because I don’t have a team to play with and because quick play is horrendous.

Outside of rank, is there any reason to care about WR? I feel like it’s a pretty arbitrary way to gauge skill when you solo queue. Isn’t it a better gauge for team comp and team play?

What happened to skill based matchmaking? Would be nice to have a solo queue only comp mode based on SBM (maybe K/D/A based) or something