Even by trying to reassure (the reader? Himself?) that LLMs are just a tool for humans, he asserts in the final paragraph that software is no longer made by humans. Something something linotype operators.
He believes that AI is making him redundant and soul-less, and at the same time tries to minimize it by reminding everyone that LLMs are a tool - yet he argues that software can now be created without humans so his perception of AI is inconsistent at best.
This is the writing of a person with an existential crisis, which will be obviously egocentric by nature, and I wish the author the best. His approach is not too different of Japanese woodcarvers, Linotype experts switching to computers... there is no real mention about "AI creep" so the extent of AI usage is inconsequential. He has realized he mastered a craft that, as all types of crafts, are subject to technological advancement. At a personal level, it's a hard pill to swallow