It's a common mistake where everyone says it's the clan kids have their own class when in reality they did have civilians in that class. If it was a class only for the clan kids it would of been only a class of 7. They literally had naruto and sakura who wasn't a clan kid and all those other background characters in there. Just because they are called the rookie nine doesn't mean their whole class was made up of clan kids
it's common mistake that's very easy to make connections with daughters/sons of clan head, moreover shinobi clans, where are you mr/mrs guard? dear author are you perhaps hikimori? live is never fair, be adapted pal!
Detmon