It sets an example. Examples are far more powerful than most people recognize.
Currently, if a man is talking to a woman, he is probably hitting on her. This becomes self reinforcing behavior. Women assume that men talking to them are hitting on them. Observers assume it is a personal relationship, not a professional one. Men avoid talking to women unless they are hitting on them because they don't want a problematic misunderstanding. This helps entrench sexism.
Meaty engagement as a professional breaks that expectation. If enough men will do it, good will crowd out bad.
Currently, women are overly vulnerable because they are professionally isolated. They get insufficient legitimate interest. This leaves them in a needy position. They can't easily afford to turn away the creeps if the only people talking to them are the creeps. They hold out hope that maybe this time it will be different.
If there are people they can reliably access who are taking them seriously, it gets vastly easier to walk away from the creeps. It also can help signal to the creeps (or the non creepy clueless) "This is how you talk to a female colleague."