"I do not say he is a Rembrandt, simple I do not know / could not decide"
You cannot tell that he is no Rembrandt, based on the outcome of nearly all his predictions?
If a meteorologist makes 100 forecasts and 90 of them turn out to be false, I don't need to be an expert in meteorology to conclude that he is a sh*tty meteorologist and that no one should take him this seriously.
I agree with your point. Which I believe could be summed up as, we prefer bull shit artists to just plain liars...And we have better things to do other than attacking people just because they don't know what they're talking about...or are wrong most of the time.