SystemD does something everyone uses, though. Many may prefer other methods, but systemD still does cover the need for init, logging, and system control, which everyone with a PC does need.

LLMs are useful to only a subset of users, so including it in general distribution is waste, because many people will end up with this software that was downloaded, installed, and maintained by someone, but they never use at all. It may not be actively using their RAM, but it is still using their disk space and has dependencies that may load whether or not it is run.

In a time of grievous constraint on hardware availability, that kind of waste is literally impossible to tolerate for many, and will force users to fewer distro choices, so they do have skin in the game and grounds to make their voices heard.