"Sowell is a highly renowned economist and Friedman is one of the most renowned economists of all time."
So I should believe them when they say things which are contradictory to my own observations?
That's an appeal to authority.

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I'm not discrediting the men. I'm saying those videos are propaganda.

To compare the way they pick certain facts which support their preconceived ideas - to a scientist citing certain measurements to illustrate an idea which they have sought, yet failed, to disprove - is a false equivalence.

If there are facts which would illustrate that the scientist's theory is incorrect, and that scientist intentionally ignores or suppress those facts by implication, then that scientist would have no credibility in their field. They would not be among my favorite scientists.

The notion that the shallowness is the same is also a false equivalence. When an astronomer says that satellites follow elliptical orbits, without any evidence or proof is not the same as someone spouting racist or nationalist generalizations. In the former case, it is plainly and unequivocally demonstrable by examining any of the facts on the subject. In the latter, there are myriad counter examples which belie the fact that one can only come to the same conclusions by picking and choosing the same "facts" in the same context.