162 pages is the entire damn manual[1], not just battery replacement, and the manual is very detailed, what is one step in the iFixit guide (which often includes multiple images in a carousel) could be multiple pages in the manual.
While it’s not great that Apple deems the battery a non-removable part of the top case, this complaint about complexity is misleading FUD.
Disclosure: I’ve made quite a few purchases at iFixit over the years.
[1] https://manuals.info.apple.com/MANUALS/2000/MA2085/en_US/mac...