It's quite easy to draw the conclusion that other alternatives were considered such as an easily-replaced battery, but Apple's management decided on a course of action which was plausible enough to be accepted without much further questioning, and wouldn't give the user back any freedoms, and would ultimately lead to more phone sales.
I don’t subscribe to that at all. I see other manufacturers dropping support for their phones after one or two years and I see apple supporting them for a long time. They want to sell services and they want you to have a working phone to use them.
Apple get phone sales from me because of this stance.