Heros run in the family not doctors

Katsuki was quirkless and was thrown out when he didn't develop a quirk, Aizawa Shouta found him and took him. Katsuki had two dads that were heroes, an older brother who wanted to be a hero, and a younger sister who wanted to be one as well, Katsuki decided he wanted to be a doctor once he saw them save his dad. Katsuki felt like he didn't belong in his family, not only did he not have a quirk he didn't want to be a hero. He got bullied for being quirkless and only had two friends, how is Katsuki going to become a doctor when he doesn't believe in himself.