Why does it matter to them so much??

They tend to be retarded and care way too much about what everybody else thinks

Because girls are the epitome of social creatures.

It's been my observation that loner/introverted/incel/FA types really struggle to wrap their heads around the significance of social dynamics, probably in large part because they themselves aren't wired that way.

I was well into my late 20s before I fully grasped just how socially driven women are.

Look at large primate groups.

There will be one big gorilla who is in charge and gets all the women. They submit to him and want to procreate with him because he has the highest status.

That doesnt mean the others makes wont get any, they might once in a while get a piece of tail but in general the females want to breed with the alpha. It ensures a string blood line going forward.

Now this assumes that you are in a closed type area. Obviously it would be difficult for any guy outside of some celeb to be the alpha in every situation and every group. That simply wont happen but for a tiny few examples.

So the trick it to strive to be in charge of just your small select group. That is a much easier thing to do. That group of course can change dynamically but if you maintain an air of being just slightly higher status than the other guys then you will obviously get more attention.

This doesnt men go to the club abnd be a dick to everyone, quite the opposite. Just have some confidence with starts with posture and eye contact. Just like the primates do.