I agree with your perspective, but I've gotten to the point where the chances of me finding a game I love and want to play in my library are like 200%. There's at least 20 games I know I will really love, and another 200 games I'm very likely to love, and I haven't even touched them once. Adding onto that list isn't "value," it's a waste of money. But this is like an opposite of a problem.
I had the same situation with eBooks at one point. My eBook catalog is getting more reasonable, but it's still easily in the realm of "you never need to buy another book again in your life."
Yeah, I totally agree, and every time I look at something to buy, I mostly just use it as incentive to play something I already have. Like people talked about Fallout 4 for a while, so I played New Vegas finally. Or I think about buying Steamworld Heist in the sale, and realize I never played the first XCOM. And so on and so on. And then the monthly supplements that with a drip feed of great stuff. But then I also clearly enjoy just buying games, so I do need some sense of doing that, and the monthly is sufficient for now.