Let us not use logic in numbers alone, for if it was of any aid, it would've had unsealed all the secrets of human psyche, which is not the case.
The wisdom of yore.
We are biased creatures. We shouldn't portray ourselves as if we're going to display the same sort of love for all those we love. With different people, we have different kinds of relationships. We tend to warm up to some quickly, while others might invoke aversion in us on a subconscious level without even having the time to think about the reaction. Women do not like to be harassed, -no one like to be harassed for that matter- but if the right person approached men or women the right way, depending on the situation, there might be a yes, just like there might be a no.
The rate of rejection always stands, as does the rate of success.
In your mind, entertaining an endeavor where there's a rate of failure is something not worth entertaining. You would likely weigh the pros and cons of every situation and take it from there. For others, fierce as they are, they will take all their chances in style.
I picked up women I don't even remember the name while they're shouting "This is crazy, I never did something like this" inside the car...etc...etc.
Someone might seem "uninterested" from afar, but once you approach them they might let their guard down and become flirty...etc...etc.
Calculations alone should not be the sole asset.