I don't think it's clear on longtermist grounds. Some possibilities:
People who have a very strong "will-to-Goodness" don't necessarily have very strong/extreme shadows, but often do, because they created the very strong will-to-Goodness by strongly suppressing their antisocial desires, which then strongly polarized those desires.
How much data do you have about people with a very strong "will-to-Goodness" having strong shadows? It doesn't match my anecdata, and I find it more plausible on priors that most people with strong "will-to-Goodness" tend to not have had e.g. childhoods that taught them the world was zero-sum, and/...
I think it's useful to distinguish between dominance in the "taking control" sense and the sadistic sense. They seem correlated but are separable in principle. (I have the former, just not the latter.)
I'd guess that Richard was also mostly replying to the aspects of dominance that are conceptually closer to sadism.
(I'm a regular poster/commenter on LW; I don't feel comfortable saying this under my real name for various reasons.)
I'm horrified by the fact that some men have sexual kinks like the ones that John describes having. My (m/ hetero/experienced) own sexuality is well-described as a reflection of my identity and values: I'm moderately but not extremely dominant,[1] mostly playful and passionate, and want everyone to have a great time.
My attitude towards John has moved from skepticism to distrust. I wonder if I'll learn that people can be deeply good...
Is it actually true that Eliezer likes hurting people in bed? I think I recall reading something from him where he claims that orgasm denial is a central example of what he's into, which sounds spiritually different to me.