What's most interesting about this fact is that steroids and other androgens have been around for almost a century. It's only in the last ~20 years that we saw poonery take hold, so it can't only be related to synthetic T. The only way I could make sense of it is if there had been something that made T/steroids way too cheap on the industrial side of things, but I don't think that happened, and you'd expect to see more male steroid users too. Maybe it does have something to do with this, since sourcing it from the ibternet is easier than ever, but where are the roidheads, then?
So I think that it is mostly related to the acknowledgement of mtfs, which has a logical conclusion of acknowledging ftms, too.