Writing can be painful because putting pen to paper forces you to think through every word and sentence. You immediately realize that the first thought that came to mind, wasn't a 100% correct idea, and it'll be more accurate and better formulated this way or that way. Writing is a sort of extended thinking, in which you're being held accountable for every word (by yourself). Some people argue that slowing down the writing process even more, for example by going from keyboard to pen and paper, gives you more time to process your thoughts, and leads to better and more articulate writing.

When I read AI-enhanced writing, I always feel like I have to peer through the blinds to see the writer's true intention. This feels very dishonest and partly offensive, because it can sometimes take several paragraphs before I realize that I'm reading AI output, rather than someone's processed thoughts.