That's a very sexist comment to assume all men are like that.
Replace "men" with "women", and I'm sure you're also the first person to scream sexism.
Replace "men" with "women", and I'm sure you're also the first person to scream sexism.
This just doesn't work most of the time. For example, compare the two sentences:
"A woman chased a man into the woods."
"A man chased a woman into the woods."
Just swapping the gender has a completely different connotation. Because gender dynamics are different in the world, you can't swap any generalization and say, "It's equivalent."
"Women don't see men as human" would, I guarantee, not create much of an outcry because it's a generalization with no underlying truth.
The point of swapping the words is to illustrate that generalizing about people based on their sex is sexist. I hope you agree with that idea. If you do, then swapping the words can simply help put a more unfamiliar form of sexism into clearer view.