I'm pretty sure the first one is mostly dead and buried in the western world, at least I've never met anyone that has hinted to a natural order where doctors, engineers and mechanics are men and nurses, secretaries and hairdressers are women
Clearly you've never met my uncle.
The second kind, well IT tends to attract people who are short on social antennas. Not that they're particularly wanted, but they don't get work in "people jobs" but as long as they can operate a computer they can do a tech job. That often means they haven't bonded on an emotional level and only think about women as objects for sex.
Being socially awkward isn't an excuse for being a raging wanker. Thing is, only thinking as women as objects for sex is pretty much an even worse version of the first one.
Then there's the whole man-woman dynamic, for the most part men want sex and women relationships so the proposal is likely to be far more sexual.
I am not convinced that's the case. Less and less so as they years go by. I know plenty of guys for whom settling down into a nice relationship with kids is/was very high on their list. I think this whole "men want sex women want relationships" thing is bad for guys. For many men it puts a whole heap of social pressure on them to go against their nature. And oh boy is the whole thing tied up with truly VAST amounts of social baggage. Until you can untangle that massive hairball, I don't really think you can make a definitive statement in that regard.
Basically I think women in general are far more sensitive about unwanted sexual attention or objectification than men are.
Women can be creepy stalkers too. I gather it's pretty unpleasant to be a victim of that.