If people prefer buying individual games to subscribing to a service then the subscription services will end up failing.
It's funny that people who prefer subscription services don't care if you can buy games or not but people who prefer to buy games seem to view subscription services as some sort of threat. I say give us both options and let people vote with their spending.
In all other forms of media from books, to TV, to movies, to music the subscription service business model is thriving. This is clearly something customers want.