Looking at the example he gives of an exercise plan, I'm not sure the advice is very good. He says don't do the simplistic plan the LLM gave, and be aware of technical stuff like "discussions of Olaf Alexander Bu on the difference between capacity and power numbers".

My experience as a bit of geek is it's easy to get caught up in theory and do stuff that doesn't work in practice. Better than either the LLM or theorising is an experienced coach who can look at what you are doing and say don't to that - it's all wrong - do this etc.