For extreme example of this look at the Kindle - obviously it’s glued so it’s cheaper to make, but it makes it completely unrepairable.
At this point ascribing any sort of "it's just the economics" reasoning to Apple is wishful thinking. They're doing this on purpose.
[1] https://www.ifixit.com/News/45921/is-this-the-end-of-the-rep...
Apple is trying to protect people (and their public image) from the scammy people who swap the cheapest shit on your phone and still charge a premium.
Then when the phone explodes and takes someones buttock with it, it's WAY too late for Apple to say "but it was a 3rd party battery, which was dodgy and installed carelessly" - the Court of Twitter has already decided that Apple is evil and their phones are crap and here come the class action suits.
So the only sane way is to make sure people can't get dodgy components installed on their devices.
Also, if every Apple Genius was Rossmann-good with similar tools, they could solder out single components and fix pretty much anything on site.
But they're not, so they are instructed on how to swap the smallest viable part when one section fails. That might mean swapping a whole case when one rubber foot falls of, but that's still easier and more cost-effective than training everyone to be a soldering and electrical engineering genius.
I've done things Apple's way, and my reward was losing access to my work tools for two weeks. They can pay for prime real estate but they can't pay to train their Geniuses to actually fix things? To change a battery? They can't keep parts in stock? Doing things their way is miserable---they are capricious, they deny they ever make any design errors, it is inconvenient. This drives people to third-party providers where they can actually get better service for the products they paid a premium for. How does this protect people?
I'm not even talking about component-level repair. I'm not talking about changing a bad chip.
These are the feet[2]. They stick on. No soldering required. But apparently that's too hard for their Geniuses to do.
[1] https://www.youtube.com/watch?v=0rCUF-V1esM
[2] https://www.ifixit.com/Store/Mac/MacBook-and-MacBook-Pro-Uni...
1) Half the stuff won't work if you solder them properly anyway.
2) Apple should not be worrying about the shoddy job repair shops might do. It's not their business. What they could do is ask for every 3rd party repair shop to declare that they are not Apple certified clearly in their website/storefront.
It's obvious that apple has spent a lot of money on intentionally making their devices harder to repair.
The purpose is to deter people who have no business being inside of it to begin with.
iFixit itself doesn't perform the repairs. They simply make and sell tools to facilitate unofficial repairs, and they had a good reputation on doing that - which, as you said, is becoming increasingly difficult.
They produce IP (researching and producing very clear instructions for fixes) and manage supply chain (trusted replacement parts & tools, worth more vs aliexpress equivalents because they endorse them).
The things they make money off are largely substitutable. Their value add (well deserved IMHO) is trust.
Don't look for gold yourself: sell the camping supplies and pickaxes to the prospectors looking for gold.
* https://www.flexport.com/blog/trade-merchants-rich-californi...
<runs from room protecting head from shrapnel>