I'm very surprised by these responses.
OP, you asked if it was inappropriate... I wouldn't use that word, but I think I understand where you're coming from.
I feel similarly when I look at groups of men discussing and trying to interpret abortion data.
Great that they're engaging, but I'd far prefer to have some women involved in the conversation.
And for those of you saying 'it's science and data, anyone can discuss it', I can't help but remind myself that data requires interpretation, and interpretation almost always has a bias.
That's why broad representation in all kinds of groups is a good idea.
OP, it's not unreasonable for this thought to have crossed your mind, and some people on here have been quite shockingly dismissive of, and rude about, your post.
I don't think there's a lot to be done about every individual incidence of what you've noticed here, but it's a good thing to notice and to raise questions about.