They might be wanting to build a proper desktop with RGB and all the jazz. While the Steam Deck does kick ass when plugged into a keyboard, mouse, and monitor, it’s not quite as impactful as a tower in terms of presence.
I use my Deck with the official dock all the time so I don’t disagree with Dindonmasker’s point that the value of a Deck is tremendous and a great alternative to building a tower.
Severn Trent Water