Power politics, all about pushing and shoving to get your way. Appraisers apparently don't have any pull. Why? Well, for example, the leadership of the appraisal organizations are people who, as it turns out, are just more of the same (concerned about themselves rather than the good of the country). It's the large lending and AMC organizations with money running everything.
You have to find leaders who care, and present them with well-structured, convincing arguments to change the way things are done. The vast majority of appraisers can't put together a convincing argument—it is just not that easy. Any convincing argument would have to show a critical advantage to the American Public, to the Voter. The AMCs and lenders are just too slick with their arguments, charades, and so on for appraisers to deal with. The appraisal system has been fed for decades by cheap trainees, some of the dumbest people on earth. I could only laugh back in the early 2000's when the head of some large appraisal organization in the South Bay said he would hire me as a Data Analyst, but not as an appraiser, when if that was what I wanted to do, I could easily make $120K+ with a Fortune 100 company doing better.
It's too late now. You are engaging in wishful thinking.