This sounds accurate.

I am not a mechanic by trade, but I know nearly everything there is to know about working on an ICE car. I did paint cars professionally for a bit.

LLMs are absolutely full of garbage advice, when I try to use it for troubleshooting. However, people who don't know anything about cars are telling me it helped them fix issues. I am assuming their issues were maybe surface level and something I would just know without even looking at any manuals, because when I use it for complex problems it just doesn't work for me.