You're missing the point, and that's because you changed the goalposts from "men really don't understand" to "can't possibly understand"; a difference that in this context is significant.

The OP was saying that men generally don't have the awareness of how women have it in the online world. The lack of understanding is because of not knowing about it, not because of a lack of capacity or empathy.

In fact the post suggest that doing an experiment to get such awareness would help in getting the understanding.