There is literally no reason to believe that any higher ups would give a prerogative to “rehash” the original. “Because it will make more money” is bullshit.
JJ and Kasdan told the story they wanted to tell, which was a new version of an old tale for a new generation. Literally every bit of evidence points to the higher ups being very hands off. Disney doesn’t mess with their properties like that. They know that the best way to “make money” is to hire people who are going to make good content and leave them alone to do it.
If you don’t like the direction they took, fine. But don’t start making shit up to “explain” why they didn’t make the exact film you wanted them to make.