> On the other maybe they still need to design their new phones to be easier to repair and this is a temporary measure?
Doubtful. Yes, they could be easier to repair and it's kind of a pain in the ass, but you can buy all the tools required to fix an iPhone 13/13 Pro battery from iFixIt for less than $100, although the tools are not as advanced as the ones Apple provides.
Also, if Apple benefits from this being a ridiculous process, which they do, there is probably no intention of making this easier. This reminds me of the iPhone battery and slowdown "scandal", there may have been good intentions at first, but then realized that it would benefit them to not tell the user what was going on, encouraging entirely new purchases rather than simple battery replacements.
Apple seems to only take exploitative opportunities when it provides the cover of plausible deniability because then it's difficult to argue. CPU slow-down? We just wanted to make sure people's phones still worked with bad batteries, please ignore the fact that we didn't tell the user the battery was bad. Repairing yourself both twice as expensive and extremely inconvenient? We're just trying to do right by the user's right to repair and provide the tools that we ourselves use, please ignore the fact that we're still charging the exact same price for the battery alone, the cost of the tools only makes sense on our scale by reducing the number of times our Geniuses break phones during repair, and request 100% collateral for our tools before renting. Please don't look at rental car services, it's not the same. Our tools are important and advanced...that's why we need them back in 7 days, no extension.