"Before anything else, if a subject isn't willing to engage with kink, I'm not going to be interested in owning them... A slave must be willing to <list>."
I'm having trouble reading this as anything other than "you must be this kinky to ride." That's fine as a personal preference, but there's an implication that those who aren't X kinky aren't... serious?
If so, fuck that noise. You can have D/s without the rest of BDSM. We regularly do mental edge play with hypnosis where my memory/identity are wiped, but we've never done pain, punishment, or humiliation.
Propaganda like this prevented us from engaging with the community for 20 years. We didn't think we were "serious" enough kinksters. Cut off from a community that sounded hostile, we had to re-learn many lessons ourselves.
If you're following this course and you think you're not kinky enough: don't worry. You are still one of us.