The premise of your argument is that "the outcome" can be separated from the process. This is true enough for manufacturing bricks: I don't much care what processes was used to create a brick if it has certain a compressive strength, mass, etc.

But Baumol's argument, which you introduced to the conversation, is that outcome and process cannot actually be distinguished, even if a distinction in thought is possible among economic theorists.

It's very true for healthcare (especially mental healthcare) and education today as well, because for most people, the choice isn't LLM vs. human attention - it's LLM vs. no access at all.