Apple RAM is superior quality with technologies you just don't see in consumer-grade chips that are bought on the cheap. Of course Apple doesn't want people using cheap RAM that causes problems that people then blame on them. It damages the brand and beauty of controlling the entire hardware and software experience to create perfect products.
Honestly I'm surprised it took them this long to come up with soldering memory to the motherboard. It's an excellent solution to an age old problem.
It's not bog standard stuff at all. There are far cheaper alternatives on the market, prone to errors, and people buy this stuff all the time. These moves are stopping people from buying upgrades from unscrupulous resellers who don't care about the experience.
What surprises me is how you get away with this nonsense.