Even leaving out all the cat calls an attractive woman can get, which are bad enough, the people that purposely follow a women, which is bad enough and kind of scary, and all the people that think the right way to compliment a women is to be crude juvenile acting idiots, which is bad enough, just the fact something like that happens all the time gets tiring. Even if men are being nice about it and well spoken when they call out an attractive woman's attributes the freaking hundredth billionth time somebody had to listen to that would get on people's nerves. I know it would get on mine. Collectively even from guys that are nicer about it I can see it as rising to a form of harassment even if perhaps an individual incident doesn't, and those people need to understand they are then a part of that.
Sometimes people just want to be left alone. Most people have times they feel like that.
It's even worse when there are men out there who will then take it as an personal affront or think some woman is stuck up when really that women ignores them because they just don't want to deal with it.