Until proven wrong by coding agents, this is still the case even for agents. Not sure why you are assuming this doesn't apply for the machine
I cannot read a 50K LOC code base at once. I mean, obviously, I can physically do it, but I don't have the patience, etc. I need mental shortcuts like abstractions layers to hold even parts of the code base in my head. LLMs don't. They can read that in seconds and hold the whole thing in context.