Same reason anyone has played any of the thousands of games that predate "the cloud" or games that don't even have a save feature. Cloud saves? No thanks, never have, maybe never will.
Besides, if you're not paying for the service, you're the product not the consumer.
As someone that grew up on well water and the wasteland that is American health insurance for dental care that has resulted in me spending tens of thousands of dollars, hundreds of hours of time, and suffering through at least twice (probably more) as many head X-rays as my peers I know exactly how this is going to play out for an entire generation.
It's probably more painful, expensive, and traumatic than you can imagine. Tooth pain is easily the worst I've ever experienced. Tooth infections are also particularly risky and left untreated or under treated will absolutely kill people.