The student should have a certified teacher of the visually impaired via vision services through an IEP. Transition is a very difficult and complicated situation. Does he read Braille? Who's teaching him to be literate? How will is work be produced? How will he access the classroom in order to be an active learner? It sounds like his parents don't know what they're doing. He should have a TVI and the school/district should be getting themselves prepared.

But if you're just the aid, and he's not cognitively disabled, yes, hands off as much as possible. If he is capable of doing something independently, let him do it even if it takes longer than it should. Advocate for him behind the scenes.