WHy does it seem that in order to weild power a man benefits if his cock is big?
It's always beneficial by its very nature, but brings about only certain kinds of power, in certain situations, and in certain professions, etc. Actors are not usually all that hung unless they are porno 'actors', and porno actors have zero power in politics (unless they're outed as escorts, etc.), or in any kind of even moderately conservative domain.
Hung guys naturally wield power in terms of charm, because big dick is so charming, so a big dick could really be anywhere, powerful or not powerful. Plenty of famous and powerful big dicks, but plenty of famous and powerful Princess Tinymeats and Princess Averagemeats as well.