[Viliam1234]

"Our thoughts have no real impact on the underlying operation of brain" cannot be literally true, if you are able to talk about your thoughts. Because talking about your thoughts means that somehow your thoughts influenced at least the part of your brain that guides your mouth.

Also, how would the ability to think evolve in our species, if our thoughts never had an impact on our behavior? Then they could not provide any evolutionary advantage.

It is possible (and quite likely) that some weaker version of that statement is true; e.g. that there are many things that brain does independently on our thoughts. But claiming that there is "no" impact is just trying to be edgy. Yes, such absolute statement sounds more interesting, but it is wrong.