Why should Valve, a small company by headcount be the "PC first party" though? They are not a platform holder, they don't own "PC" but simply are a storefront. They produce hardware in the form of the index and the steam deck. They released their last game (HL: Alyx) the same year Naughty Dog released their last original non remaster game. In fact, they could release 1-2 games per decade and be at the same cadence as most triple A studios.
They are not the equivalent of Sony and MS in the console space. And even if they were, their refund policy and regional pricing makes them far more consumer friendly than the former 2.