My favorite argument for this is always:'that's why I've grown out of anime' and quit it. And I couldn't blame him.
"uhum, yet you watch "The Matrix" or, Bruce Willis movies such as "Last man Standing" and all that.
Or movies such as Troy etc." or any of the comic-hero movies these days.
Not that I wouldn't love to see more of a struggle like during the duel but in terms of powerlevel, it should be seen as "professional boxer vs some random street thugs".
I don't like the "powerjumps" though