Why is it a guys job to approach a girl if she is going to reject him anyways?

I still don't understand this notion that guys should purposely put themselves in vulnerable positions just to get their heart broken. Quite often I hear girls and women say nasty, awful things about men and guys. It seems to me love, relationships, courting is dead, there's that saying it takes two to tango well why do you think many men don't care about committing acts of chivalry? if you care more about your IG likes with your girlfriends than guys will stop caring and just have a numb approach of "fuck and dump" (ie: 1 night stand). I'm just being real, this is what most guys I know have told me, that they do not want to be committed because all girls and women care about is attention on social media and driving her career to make more money.

I know a few girls who have this approach but to be honest they are single and miserable. This question may not garner a single response but that just goes to show me women can't truly give a REAL definition why they think this way and what should change. Please if you respond don't give me a generic response such as "all men are scum" or "not all girls think that way".
Why is it a guys job to approach a girl if she is going to reject him anyways?
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