You'll find a lot of people reuse scenes like this. Stock footage is the correct term I believe. On one hand it makes it easier. Maybe on another it's paying homage or showing similarities between characters. I really don't know. I was not apart of any of those teams when that decision was made.
You'll also find that the "east" and "west" share the same faults in animation.
OP: Your buddy is expressing his opinion when he says he hates anime. It happens. We all express our opinions when we start off with I hate or I like. We also very commonly contradict ourselves. Its completely natural for you to get defensive about something you like.
As for everyone else, RELAX. Go watch a movie or read something. And don't be so uptight about things.