Agency may be better understood as Michael Levin's approach where e.g. a lifeform is something that can achieve the same goal using various methods (robust).

Having said that, you can now simply move the goal posts to say that while one human cannot read that much in that amount of time - the collective of all humans certainly can - or at least they can approximate it in a similar fashion to LLM's.

Since each of us can reap the benefits of the collective then the benefits are distributed back to the individuals as needed.

Certainly all of humanity could approximate the reading of an LLM for now. The energy consumption of humanity is about 20TW at this point, so over 20,000 times higher than the next generation LLM training runs. Just like the LLM training does not only spend energy on their “brain” neither does humanity.