How about global supply chains for food and clothes? How about the social systems such as healthcare and education? How about infrastructure like the internet or roads? Does each "independent" man do it all on their own?
What if I told you the joke wasn't that [gender a] does everything for themselves, but that [gender b] and [gender a] do the same amount while [gender a] doesn't break an arm jerking themselves off about it.
Not my post or joke so hang onto your seething hatred please.
Men don't call themselves strong and independent because society already expects them to be strong and independent. It's not news. It doesn't need to be said. Thanks to the patriarchy, it's unfortunately news when a woman is strong and independent. Even if most of them have been strong and independent for a long time.
It doesn't feel like news to you because women have been saying it for a long time and you've gotten used to the idea of women being strong and independent. That means the feminist movement has had some success. But there are plenty of men for whom it is news, and plenty more who hear it often but refuse to believe it. That means there's still progress to be made, even if you personally have been converted.