Add a keyboard, mouse and monitor, which are already required for every other pc, and you can do everything on the steam deck that you can on any other pc. The steamdeck just has the additional functionality of working without those if you so choose.
I mean not really. Even if they have a rough idea of how many times their game has been pirated by looking at seeder counts on torrents or whatever, theyre definitely not taking those numbers as a win and saying “look how many people didnt pay for our product, that just proves everyone really wants it”. Theyre comparing sales numbers.