Scrum is an industry run by a small set of special interests that wants to keep things from evolving, because that way, they remain the standard bearers.

It is like in any field. E.g., in the arts, there have always been self-appointed "guardians" of what is "legitimate". Consider the field of ballet. Why did dance - an art - become codified into a rigid form, governed by rules, and masters? And then "modern dance" showed that none of those rules were necessary - to the chagrin of the opera masters.