It doesn’t seem like a very “walled” garden if they were able to migrate all their data including issues and comments

I’m guessing women don’t get drafted for special operations in Ukraine

Pretty sure they can. Or at least, they can deny you entry into the country if you decline to unlock it for them.

And how do you de-drm them? Is there like some community calibre plug-in for it?

Making note for when I buy books in future

Where do you buy from?