Is that really the case? Maybe if you DIY the replacement? When my Pixel 4 battery started expanding (and popped the back off the phone) 2 years ago, I contacted a local repair guy who came to my house and replaced the battery for me for $80. That was 2 years ago and the battery has been fine since. It's certainly degraded a bit over those 2 years, but no more than I'd expect. I still get a full day of charge out of it, and then some.
Yes, we absolutely need to be in a place where DIY battery replacements are reliable and cheap. But using a local repair shop seems to be a perfectly fine alternative for now.