2 months of gamepass is cost of "owning" a game. Are people really blasting through a new title that frequently? Even during my peak gaming era it usually was the exact same like 3-4 titles on rotation for years.
The last games I've touched in 2 years that were new is Death Stranding 2, High on Life 2 and Flight Sim. Everything else was free like Battlefield 6's multiplayer etc.. so thats $190 vs $537 for Gamepass PC.
Two things: first, yes. Back in the day, I'd easily burn through a new game a month. That's not as guaranteed today as it was then, but I have already played Expedition 33, Hogwarts, and Star Wars Outlaws this year, via Game Pass.
But second, it's not reasonable to compare your playing behavior when each game is an individual purchase to your playing behavior when each game is part of a monthly subscription, having a marginal cost of $0.
I also used to have 3-4 games on rotation for years - when I was a kid living on my parents' budget with a secondhand NES. That was not a predictor for my behavior when my finances changed, nor would it have been a good predictor for my behavior if (say) my parents' cable bill included unlimited game rentals.
And as sort of an addendum to that point (so I guess it was three things), it is important to note that the monthly subscription model makes the marginal cost of trying out a game you're not sure of $0. $70 is a lot to ask for a title about which I'm dubious, but if I can just give it a try? No problem.
Which, in my case, means I played Expedition 33, which now ranks as among the all-time greats of my gaming career. If I'd had to pay retail for it, I simply wouldn't have no matter how well it was reviewed or respected; I hate JRPGs. When it didn't cost me anything extra, though, it was easy enough to say "I should probably see what all the fuss is about, and when I stop playing after a few hours I've lost almost nothing."
And come to think of it, if Rocket League hadn't been free via PS+ way back when, I would never have picked that game up. And over the years, I've put thousands of hours into that game. Ditto Tower of Guns, though that can't be more than a couple hundred hours total.
None of which is to say that a Game Pass sub is a good idea for you, of course. But I don't think it should be difficult to understand that for some - perhaps many - gamers, it is unquestionably worth it.