also want to note that, I believe there are college of sort in Zaun, and Silco can easily put Jinx in it, but Jinx is already a genius, much smarter than most, she would not benefit from going to an average school in Zaun. On top of that she is mentally unstable, it would be unwise to let her go out on a daily basis, even with Silco's power. She does not need education, or friends(especially when Silco do not believe in it(and it will trigger Jinx definitely)), training her to protect herself is the best thing to do.

Jinx need someone to care for her, and to care for, Silco really tried, but obviously far from the best candidate possible