I agree, though would place the base probability that most self-explations are ChatGPT-like post-hoc reasoning without much insight into the actual cause for a particular decision. As someone below says, the split-brain experiments seem to suggest that our conscious mind is just reeling off bullshit on the fly. Like ChatGPT, it can approximate a correct sounding answer.
You can't trust post action reasoning in people. Check out the Split brain experiments. Your brain will happily make up reasons for performing tasks or actions.