

Absolutely. It’s also an immense amount of work to get a platform up to a competitive standard with Steam; I’m not sure a small company will ever be able to catch up in any short term time frame.
But stores like Fanatical, GreenManGaming, GameBillet, etc. have the better idea of just being stores that focus on getting customers better deals. They don’t even attempt to edge onto Steam’s turf because a storefront can’t compete with Steam, nor can a half-baked launcher.
Reality is that Valve has functionally a 20 year head start on any company that wants to try and edge in on their turf. So it can’t be done just to get a cut of sales because you’re not going to have the follow-through to build the user base if that’s your reason.
Really, just get whatever peripherals you like. Don’t expect to be able to do a lot of extra doodads since you won’t be running any extra software to enable advanced features, so just get something you like that’s comfortable.
I use the same keyboard and mouse I use with my primary computer: a Nuphy Air75 v2 keyboard and MX Master mouse.