This is not true at all. The only stats that get buffed are your atk and ninjutsu, the other 3 mains and all the secondary stats aren't. If you are 70k power just about 20k of your power comes from atk and nin, so that buff just give you 4k more hidden power and you can very likely not be aware at all about his existance since lasts for one battle only if you are victorious. Try to use cursed mark test if you are azure fang and go against a real player (not kakashi clone) if you are unlucky and you get all low value of rng damage you won't even notice that is up.