EDIT: to clarify, if you can predict what a famous personality is going to say on a given topic well enough to replace it with a chatbot, listening to said personality on that topic no longer has much value.

This is true to the extent that all of one's beliefs, thoughts and feelings are reflectively consistent, incorporating all available evidence into a cohesive, integrated whole.

Comparatively little of the process of learning is the absorbing of evidence not previously heard. Most of the benefits come from deliberate practice and repetition. If I didn't listen to the advice of people whose advice generation I could emulate I would be much worse off.