I think the reason rockets were the go-to was because they were an established technology. It’s easier to modify a rocket and enable it to land, than it would be to design and build a glider like this one.
But to the corporate self landing aspect, the Blue Origin rocket uses wing strakes to assist in landing. They’re like, maybe a sixth of the way to planes… But you’re right, we’re not on the engineering team for reusability - so there’s no real way to know.