The gender stereotype it's exaggerating is not only that women talk too much, but that their talking is pointless and uninteresting. As gender stereotypes go, it's actually pretty far up the offensiveness list.
I took it as a joke about "women want to talk / empathize about the problem they're having, not talk about how you'd fix it." Which can be true in social contexts, but is totally absurd to apply to a sinking ship, hence the humor.
But it's 100% possible that I'm reading too much into it and the joke was just "Haha women talk a lot about pointless things," in which case yeah, I probably wouldn't have laughed.
From another less popular angle, "Men are worth less than women and children and thus don't get to be on a lifeboat". See now everyone gets to be offended.
