Sure, selling a big vision is important to new startups. That's just one of many constraints and risks you have, but like all risks it can be navigated well or poorly. They could sell a big vision but also have a plan to increment there, but they didn't. I don't think that negates the fact that Magic Leap never presented what their groundbreaking idea was for why we needed AR.

If you're interested I do cover this among other things in the linked essay.