Really sad that at the end of the day "Agile" meant more admin work and meetings and no noticeable improvements (to me). Of course management saw "improvements" but the "scrum masters" would just tweak numbers to make it look like we met deadlines or completed enough story points. It was really sickening to watch everyone pat everyone else on the back for doing a good job when I knew at least 1/3rd of the scrum teams didn't get close to what they were supposed to accomplish.
Conversely, at another employer they pasteurized "agile" into their own canned "agile-fall" methodology that had many antipodal theoretical conflicts, resulting in just 4 week single iteration waterfall sprints. The results of said agile-fall were very lackluster as no one was empowered, and there no greater clarity into process for dev's.
As such, there is certainly a right and wrong way to do agile. I'd say too many companies fear it because it let's the patients run the asylum (dev's) and reveals that you really don't need so many PHB's.
As the groups mentioned in the above comment have shown a stronger presence, even more people from these groups appear. And, as the number of developers has dwindled, there has been less reason for others in their profession to come and share.
Right on the money I'm afraid.