MacBooks aren't that unrepairable, you just have to go to someone who isn't Apple. Apple will tell you that you have to replace the entire logic board, and then you go to the independent repair shop and they can fix whatever it was for $100.

I've repaired my MacBooks multiple times before (although not one in the last seven years, so maybe they are totally unrepairable, but I doubt it).

The main issue is that Apple will want to replace everything to avoid you coming back and saying it didn't work, when it's actually a different issue.