It's all in how you play your character. Remember Genjutsu involves fighting smart and fighting stealth you need to hope that you can overpower their mental powess or hope they can be piss in defending against it like Mitsuhide. I once had a kid in a percy jackson rp who outfight a teleporting time stopper to a draw because he was lucky and he was that good. If you want to play the Haruno clan go ahead. However with that being said remember Uzumaki, Sarutobi, and Hatake have all strong ninja who don't use kekkei genaki as well.