Watching HS reg battles...

So I have spent the last few hours watching reg battles with Nacho, Stefan and Berry. Is it pretty safe to assume that since they are all very solver proficient and they know all their reg opponents are as well that they are going to be calling rivers significantly lighter than the rest of the population playing online?

I mean the hands on the video are only showing the ones that went to river so maybe their frequency is skewed because of the video. There's one video that carrot posted where his student was able to show how a solver would play a solver although there were a few mistakes on it. It would be very interesting to see a solver play a solver over a large sample. Forgive me if these are novice questions I am just getting back into using solvers.