Naruto Thread (Spoilers For Sure)

I got a question, if to get MSE, you have to get your brother's eyes and take yours out, wouldn't it be better to simply exchange eyes?. instead the full i'll kill you and take your eyes crap?. So, with this all Uchihas would've been a lot stronger instead of a clan where everyone wants the other's eyes?.

I think the emotions are different between exchanging balls and killing each other for their balls.