Earlier quoted context omitted.
I don't know how big the adoption is in the US for nokia "dumb phones", but in Europe they sell really good. The first thing you do when you take them out of the box is to put the battery in. Even if the person at the store does this for you, just by watching you can easly do it yourself. And since iphones are a huge role model, if they implement it others will follow along.
All of the physical mechanisms required to allow a user replaceable battery are fragile and take up valuable space. It’s not a simple matter of just allowing it. It could actually lead to more repairs due to failure of those parts, and you certainly could no longer make the backs out of glass or other exotic materials. They would all have to be plastic.
Shocking, I know...