PC gaming is actually a competitive market that would still give players options to escape that (Gog, steam, Epic, itch and humble dumble, hell even Microsoft store and company launchers), it is not guaranteed to never happen because cartels happen, but it is far more hard and improbable than consoles, which are locked-down computers with unbreakable monopolies installed in then, at the mercy of the feudal lord of choice. PS: not to mention, Piracy, emulators and Libre games on linux.
Large library of games is factually incorrect, you just do not know the scale of games in existence. Far more titles in Steam, gog, itch io, and with emulation this all goes to the square power, the largest library of games is a PC.