You don’t. When Valve first started with Steam, everybody hated it. I myself held out for a long time, not wanting a useless program hogging resources.

But gradually it became clear that Steam was actually just a game store. Except having to go to a store and rifle through boxes, you could do it from your PC. Yes it launched the games, but that was just like having a single folder with all game shortcuts. Its main purpose was discovering and buying new games.

Other vendors saw its success and wanted a piece of the cake. I think they mistakenly thought the launcher was an important part of Steam’s success, when it was in fact the large catalogue and good discoverability. They use exclusivity to lure customers, but can’t possibly compete with Valve.

Now we are at a point where the landscape is divided again. The majority of games is on Steam, but enough have their own place that the “single folder with shortcuts” became relevant again. That’s where the likes of Heroic and Playnite come in. These are no longer stores to buy games, but are simply a convenient way to quickly start the game you want, regardless of its source.