The battery costs $7-$12 to produce and ship to your location, so kind of strange to say $70-$120 is cheap.

It's a philosophical thing, sure. But the EU is taking the approach that businesses should make honest money by selling quality products, not through consumer-hostile practices like inflating the cost of spare parts + labour for fixing stuff.

In the past our family has had several Android phones where the battery was easily replaceable. We even had a couple of Motorolas where the screen was a simple and cheap thing to replace. That seems to be increasingly a thing of the past.

With those phones, I have never once experienced a failure mode related to seams / screws holding the phone together. If it's one thing that's extremely well known technology, it's fasteners and gaskets for consumer products.