I knew a 16 year old girl in university. She was taken advantage of by several adults who were in positions of authority or mentorship. She was technically above the age of consent, but she was harmed severely -- both in terms of trauma and reputationally: dating a 16 year old results in 16 year old drama and that killed her career because those were the guys that were supposed to be stepping-stones for her career. She was entirely capable of interfacing with adult peers, but she was exceedingly naive. I agree that 14 year olds, regardless of intellect, should not be working full time anywhere.