Okay, this is an opinion a lot of people share I guess. But, it's woefully misguided.
Men are not gatekeepers to marriage and monogamy. Both parties are gatekeepers to their own damn selves.
Any man who has a problem with women knowing and pursuing what she wants from life is not much of a man and certainly not one worth having. That means takin the initiative to pop the question can prevent you from making a bad mistake basee on tradition if he reacts like a heel.
Women initiate most divorces. So, if shes the one who pops the question, maybe that rate will drop? Hard to say as there are many factors.
Waiting around for a man to get his act together to ask the question means you make yourself vulnerable to being strung along. As a woman, you don't have the time to jerk around a man does if you want a family.
So the ultimate point here is that for every viewpoint you laid out there is an equally viable counterpoint looking at it through another lens. That means your entire premise is not persuasive or sound advice at all. It's just perspective.
As you said, you do you. The rest of us will sort ourselves out based on what works for us instead of this sexist bias.