In theory yes, but in practice I don't think there are many pc only games any more, most are cross platform (or exclusive to a console brand). PC only games are usually mmorpgs, at least a few years ago, and those aren't usually that resource intensive.
I don't really know what is popular anymore, but a quick search for pc games mentioned this:
https://en.wikipedia.org/wiki/Apex_LegendsWhich was launched this year: "It was released for Microsoft Windows, PlayStation 4, and Xbox One on February 4, 2019, without any prior announcement or marketing." And both PS4 Xbox One are over 5 years old...
Often games have settings where you can turn up the eye candy, and to get to the best graphics settings you might need a top notch machine, but the game must also run nicely on the 6 year old consoles, so it's not going to be necessary to play the games satisfactorily. Maybe there are a new console generation on the way with updated hardware, then you wouldn't want to spec your pc below that though.
There might be some new pc only game that I'm not aware of that is very demanding, but I would guess they are few. Otoh, if you intend to buy a pc gaming rig maybe you have a specific pc only game in mind.