This statement was made by Ubisoft's director of subscriptions, Phillipe Tremblay, who recently spoke to Gamesindustry.biz about the digital future and Ubisoft Plus specifically. Tremblay states that people eventually "got comfortable" with not owning their CD or DVD collections, and that a similar shift in attitude "needs to happen" in gamers.
They've removed plenty of games. At least so far, there's always been notice a few weeks before they leave and the game remains in the store for purchase.
I've actually bought a few games on steam because I could try them on gamepass. No man's sky, last call bbs, and Bloodstained: Ritual of the Night come immediately to mind.
So maybe a good adjacent, but I wouldn't trust my primary games to them.