I prefer non swappable phone batteries. If I need to charge my phone while out I use USB power bank, which is infinitely more useful than a naked phone battery that can only be used in the phone. Non swappable batteries also allow for phone casing to be much more resilient to impacts and the elements, and can help reduce the phones size.

A phone battery is not to going to reach end of life for 2-3 years in normal use, so it doesn’t seem too much of hardship to get the toolbox out or go to a service centre when it does eventually need replacing.

Maybe require manufactures to not use such incredibly strong glues that some use to secure the batteries, but mandating they be swappable seems the wrong approach to me.