dvcochran
Grandmaster
I anticipated such a response.Also no.
I am an engineer with two Masters degrees and multi business owner (I know, la-di-da). Pretty much a full on nerd in the aspects of discovery. I have to use SM in my work all the time. I am probably the most obsessed person you will meet when it comes to finding 'concrete' evidence. Although I imagine you would give me a good race.

History has countless examples of things/methods/products that had been 'proven' to be the best for a given purpose, only to find it was full of flaws. Mercury, radiation, tobacco, cocaine are just a few that come to mind. For a time, they were all miracle cures.
Granted, not as much in this day and age but some choices are made because of a lack of choices. Just real world stuff. I would say more often a choice is made based on the aggregate of circumstances. I will try to make up a scenario: You are on a job digging a shallow well several miles away from any resources. Your main tool breaks close to finishing the job. You have other tools that can finish the job but will require a lot of extra work. What do you do? Delay a day or two to get the correct tool or add labor cost and time to the job? And these kinds of 'what ifs' go much deeper and go on and on in the real world.
On paper we can all set back and look at problem, scenario, or product in the best case and say "this is what I would do" but that is so far from practical.
So, in regards to MA's I don't know how any of us can arbitrarily call a school/instructor/teacher/style bad without spending some time with it/them.