Did you actually hear him talk? There is no need to be insecure about your body’s abilities. Not only “alfa” males can do things. “He can do it you can (potentially) do it” sounds quite proven to me, do you disagree? So the only question (for me) is “can he do what he says he can”.
wim had world records in ice diving and has worked with researchers on studying his breathing technique. that said, HE IS AN ANOMALY. Hes been shown to have higher brown fat percentage then the average male (including his own twin).
so no, just because he can do crazy things like dive into a frozen lake for X minutes doesnt mean the average person can.
That said. the breathing exercises and cold showers DO have a positive physiological effect and they are worth doing, even if you dont become superhuman overnight.
do his breathing technique every morning when you wake up, its like a very potent meditation that makes you feel good. im about to do mine now.