It is supposed to be anonymous with our MitID system, which is already in place for almost everything. How it works (on paper at least) is that the social media site would send a question to MitID, like "is this person at least 16?" And MitID just responds with yes/no
So again, in theory, no social media site should be getting your ID here. Only the government, which absolutely has it and is in fairly high trust from the people in Denmark.
Definitely part of it. I'm a huge nerd, but years ago raced motorcycles in the US. The demographic makeup difference between that and going to a local MTG event is insane. Seriously, out of hundreds of people at a race track at a time and a decade of doing this I know 2 openly gay people and 0 trans people.
Not sure you could go into my local MTG shop without seeing that many gay/trans people. It's lovely, but I think highlights the bias in what hobbies people will lean towards or how honestly they'll be about themselves depending on the social situation