I haven’t read all the posts, so my apologies if this has already been discussed.
I took this story to be an allegory for current political events.
Something represented by the moon is trying to reinvent itself and is being attacked by an aggressive infection. An infection that wants to stop, and can be overcome by, women being allowed to make decisions. Something that the Western countries are attacking. And is represented by a ‘dragon’ that looks like a star and an exploding/crescent moon.
Surprisingly political for Doctor Who. Something we haven’t really seen since the Pertwee stories about political issues like the mining strikes