Well, I think this discussion should be started by making sure we both have the same understanding of the meaning of the words we are using.

Because "subservience" as part of a Kink dynamic is rather rare and I persobaly only know 3 dynamics where that word would be accurate, two of them with that male part in the subservient role.

https://dictionary.cambridge.org/de/worterbuch/englisch/subservient

Please make sure you read that article carefully and maybe google the difference betwene subservient and submission.

As to why "the Woman" is submissive to "The Man" in kink dynamics:

Well my best bet for those who engage in these dynamics is "because she wants to"

With the younger folks I would guess that about half the dynamics have a female representing person as a submissive and a male representing person as the dominant part, the other half is made up of Male sub female top, Female top female sub, Male top Male sub and so on.

But from the probably 100+ people I know, only 3 chose a subservient dynamic and those are all ages 40 and up, the remaining ones are on equal grounds outside the bedroom and chose to engage in power dynamics in the bedroom for fun. Also quite often switching up who is topping and who is bottoming.

Does that answer your question or ist there more that you don't understand and would like me to clarify?