Woman-centered is not an absolute. One does not have to be part of a single characteristic of a group to have a stake in it, to be an ally, an advocate, a partner, a family member, among countless other scenarios.

I would suggest reading up on intersectionality.

By the way, all of this is covered in the subreddit sidebar, including in an FAQ in the wiki.

Neither the WvP subreddit nor the Discord excludes men from identifying as witches or from participating in discussions.