xiaoyasso
I disagree a little on the issue of showing talent, for example: Minato would never have Jiraiya as a master and would not even have access to the hiraishin if he hid his potential.
Or we can just say the case for Minato was plot Armor. You can say most of the known geniuses were dragged in the political battle in konoha.Example Orochimaru, Kakashi, sakumo, shisui, Itachi. By showing talent you get on the eyes of danzo.
Leitor_Onisciente:The question of staying 6 years in the ninja academy is more up to each one. For geniuses it's a waste of time. At some point Haru will go to war, there's nowhere to run.