Actually the quote sounds almost word for word what Lamar Hires said on his video:
"a particularly easy way to die",
and I find it hard to imagine that he would let himself be influenced by the PADI marketing department or do anything that could be considered red flag waving.
As to PADI/DSAT´s motivations, I really think their motivation was partially or initially because Brett Gilliam started SDI when they had an old agreement stay away from Recreational and PADI will stay out of technical.,
however I would be speculating, and c'mon, these guys are not stupid, Drew Richardson himself is a cave diver, I know, I dived with him in Dos Ojos and ironically he told me to be careful if I dived deep air.
Perhaps they thought that though there was no shortage of tec agencies, there was a shortage of tec agencies with a dedicated quality assurance and legal department.
Anyone can control an agency that has only 32 instructors, but as you just stated there are more than that now and that requires a standardized proven system of diver education.
you can write and ask him at
drewr@padi.com it is a good question and I am sure he would answer it. When he does, share it with us.