If I take a math course and everything is submitted from someone else solving it for me I'll come off learning nothing.

And usually when it comes to advanced work it builds on the understanding of previous ones, so if you come off learning nothing from the one before then you hit a road block.

If you are able to do something with zero knowledge then it is something they don't need you for, and you'll probably lack the skills required for the advanced ones that do if you couldn't even do the basics yourself.