This is overly simplistic. Feminism argues for different expectations, not necessarily higher ones. Feminists have (largely) come around to accepting that whatever women want to do is fine: have a full-time career, raise kids full-time, somewhere in-between, something completely different, etc. But there's been no analogous movement to promote the same for men.

And I have no idea what could possibly be dumb or dangerous about not prioritizing wealth over everything else.

One of the indirect benefits of feminism is that more men are more involved with their families, and more men are choosing to be primary caregivers. There are many, many fewer men who go this route than women, but it's slowly becoming more acceptable.

The point of the article is not that men should not be ambitious, but that their self-image should not rely on how much money they make.

You might consider it "ambitious" if a woman spends a significant amount of time, money, and effort on her appearance in order to look like a celebrity or supermodel, but others would call it "dumb and dangerous."

A man's self-image should not rely on how much money he has.

But a woman's image of that man will often depend a great deal on how much money he has. Not all the time, and it's not the only factor, of course, but to say it's not a big or frequent factor in the real world is to deny reality. (Not assuming you think that, more that the OA's message came close to making this mistake.)