Wait, I’m confused. How can a 4K scan of a print have less quality than the terrible 720p Blu Rays?
The Blu-rays are based on scans of negatives, not prints. Negatives have a lot more detail than prints. So no matter how badly they screwed it up, there is often still more detail in the Blu-rays than anyone saw in the theatre, or that we’d be able to get from prints under the best-case scenario. That’s not to say there isn’t the occasional DNR bloodbath that erases, for example, Han’s mouth…
Also, if you wanted a reproduction of the theatrical experience, you might not necessarily want all that detail from the negatives. I would, but that’s more of a philosophical argument.