Name me one person on Earth who called Hakeem Olajuwon, David Robinson, or Gary Payton dirty?
How about MJ? How about Pippen? How about Tim Duncan? Duncan is a great defender. Does Duncan have to resort to bushleague pussy moves like undercutting Stoudemire, Shaq, Boozer, KG, etc or does he just beat them with straight up solid defense.
The every great defender was dirty is utter, utter garbage. Was Bill Russell, widely considered the greatest defender ever, called dirty by even one person?
What Bowen does is reprehensible. Consistently undercutting players with awkward and clearly intentional kicks and sticking out of the feet is not basketball. It's just being a and a coward.