This is exactly the situation for desktop games right now, something Epic is profiting immensely from. It's an extremely annoying situation for users, having a dozen launcher/store apps around contributing to bloat.
I'll happily have to deal with a few extra launchers on PC in comparison to what the alternative is.
The desktop games market is much heathier and less dangerous for users than the mobile app market.
This is where I see how long that battle will be.
The future where this "extremely annoying" situation is fully solved is Xbox XXX being un removable and the only Game Store allowed on any PC sold, with legal threats to anyone jailbreaking.
As long as user have a choice and control on their device, and competition is alive, we'll hopefuly have different stores with different rules and you'll be extremely annoyed I think.
Competition is awesome.
Is it? I regularly use Steam, Epic and XBox and occasionally Ubi, Larian and whatever the GoG one is called... and it's fine. It's just another program.