This is the prevailing opinion of people even outside of tech.
That said, I think it's a good thing that this sentiment is coming to the forefront.
He was complaining that he would ask how to perform a certain repair on a car, and the LLMs he tried (ChatGPT & Grok) would give him a long involved process and he'd ask why not do it this simpler way and it would say, oh you're right! He just found it gave bad advice and realized (rightly) that in areas he has less expertise in he has no way to judge how good the outputs are.
This is from a guy who loves tech, historically worshipped Elon, loves his Tesla, and (rightfully again) didn't buy into SpaceX because he thought it was overvalued.
In the past when I visited for holidays he was liable to have a positive outlook on LLMs and their utility. Seems telling that he's starting to see the cracks.
This is easily the biggest problem with the current models. The models are just way too eager to please / say yes to the point that the models are happy to lie/make shit up if it means it can say yes.