I understand, you can use the steamdeck docked liked a normal desktop of course.
You just have a fairly hardware limited extremely lightweight gaming desktop that you can throw in your backpack, but it still does a damn fine job of that too so shrugs. I mean get a Logitech k780 or whatever Bluetooth keyboard you like, a mouse too, Bluetooth works just as fine on the Steam Deck as any other laptop.
I like plenty of indie games and I have a deep love for entire genres of video games that categorically don’t require any computing muscle to work (cataclysm dark days ahead I love you) so I don’t care as much about having a super powerful gaming computer at this point in my life but it is definitely a valid criticism of the deck.