I think you're focusing on the wrong part of his/her "it's just a file" argument. The actual point wasn't about the file packaging/form, but about the fact that it's just passive - just a function sitting there waiting to be called, not an active agent able to act out on it's curiosity.

Curiosity is a trait of an agentic system where curiously is driving exploration leading to learning.

I'm focusing on what they said. They said "an LLM, fundamentally, is a file".

Which is true, but the implication is that LLMs can't be agentic, which may or may not be true.