There is a significant issue of retention for students. You typically want a "training-wheels" sort of experience to capture the student's imagination early on. Will it be the last tech they ever but? Obviously not. But having options other than "build stuff from scratch" is super important to growing interest in any particular industry.

Written by a guy who experienced a hell of a lot of criticism 20 years ago for writing games in JavaScript and now is the lead VR product engineer for a company.