I mean I would definitely consider it in poor taste if a woman started making tone deaf jokes about male suicide rates. You get a lot more leeway when making fun of a group you are a part of. You combine that with the general assumption that everyone on the internet is male until proven otherwise, and yeah in this kind of forum it’s much more acceptable to make jokes at the expense of men than women.

There’s also a bit of a disparity in the examples you gave. The idea that men die earlier because they take medical advice from Joe Rogan is obviously not made in sincerity. The overwhelming majority of men have never listened to Joe Rogan and besides a few high profile examples I don’t think he actually gives that much medical advice. Though it would be harmful if people genuinely believed this was true, it doesn’t seem likely that anyone would.

On the other hand, Women being worse workers due to emotions or their periods or whatever is something a lot of people genuinely believe. In some circles those statements wouldn’t be considered jokes but rather serious opinions. Repeating those things, even if you don’t personally believe then, reinforces the ideas and is clearly harmful to women.

A similarly offensive “joke” at men’s expense would be something like “men die earlier because they’re too stupid to see a doctor”. This would be a bad joke, because it’s taking something which is basically true, men don’t see doctors as frequently, and tying it to a real and harmful stereotype, men are dumber than women.