Hi Manfred -
"Re: 1. "It's a certification mill." And so are all the other providers - like Scrum Alliance (just to name one). One intent of certification is to provide reassurance that the participant can understand and contain information. Applying your concept, every university is a certification mill."
I agree re Scrum Alliance.
Regarding universities, a university course is not two weeks. A university degree consists of many years. That is at the other end of a spectrum from SAFe or Scrum certification. It is a matter of degree. An ant is not the same as an elephant just because they are both animals.