I don't totally disagree with you, and I don't totally disagree with Tim's points here, but then we (gamers) see Epic pulling exclusivity agreement bullshit, which is annoying as hell to consumers. Isn't it possible that Valve's cut is actually worth it? It's the superior store from a consumer perspective, they have good customer service, easy refunds, helpful review scores, and a hundred other things. There are many, many reasons that Steam is on top.
I don't see indie devs telling people "buy my game on Epic instead of Steam because Epic takes a smaller cut". Many devs actually do say that when their game is on Itch.io, but I haven't seen many indie devs defending Epic here. The only ones going exclusive to Epic are the ones that Tim literally paid to do so.
Yeah it's a data broker broker. Totally legit.