So you're saying Disney leadership cannot follow Walt's vision and theme park rules, which have carefully and meticulously recorded by one of the company's most accomplished Imagineers, because shareholders won't let them and because the CEO didn't know Walt personally?
I'd encourage you to read the document I linked. It's literally a blueprint for how to build and run a successful theme park based on the actual experience of Disneyland, and it speaks directly to how lucrative Walt's vision was/is. It includes critiques and endorsements, but investors are quoted as saying:
"He (Walt Disney) has proved that high dedication to social and moral values and being a good businessman need not conflict''; he not only made a vast fortune, but also has contributed to the betterment of the country through his innovations"; "he has the finest ethics of any man in any profession I have ever known"; and "he has been able to make a large profit, while contributing to the aesthetic well-being of millions of people."
Don't you think this is something Josh could carry into his leadership of the company? Even if he didn't know Walt?