I don't think this thread is actually open to differing opinions, and is already showing signs of becoming a pile-on, but ok:
The difference in character that I see is about freely given, enthusiastic consent.
I like receiving pain, and therefore I also like giving pain, to someone who I know is also enjoying it. So all I think that says about my or a partner's character is that we're open minded and that consent is important. I would not enjoy giving non-consensual, not-actively-wanted pain, and think that's a different thing.
I don't enjoy adult baby play or furries or a bunch of other things, but I have no issues with consenting adults enjoying them with other enthusiastically consenting adults.
If you're talking about people who are pushy, coercive, entitled or similar, with not-enthusiastically-consenting partners, then yes, that's a problem, but it's about the above-stated aspects of their character, not about the specific sex acts.
In the "degrading" example - it could be, but isn't necessarily.
It's called "role-play" - it's a form of acting, in a specific, agreed, safe context.
Otherwise are you arguing that all actors who play serial killers or other "negative" characters are intrinsically flawed because they agreed to play that role? If not, why does playing it for money make a difference? Is it ok for a professional actor but not an amateur dramatics person because they're also doing it for (non-sexual) fun?
But sure, there are people who want to play with degradation in bed who also secretly hold prejudiced and unpleasant views about the person or class of people that they're degrading.
The existence of some doesn't mean that everyone is.
Most of these arguments fall down because they assume single motivations for actions, and that classes of people are identical monoliths. Life, and human psychology, is way more complicated.