evolutionary reasons

it needs to be considered how evolution formed humans 

a guy that discovered fire was probably considered by other humans 

to have a high value 

and a guy that was able to use fire to hunt a and cook animals 

was probably considered by other humans to have a high value 

and a guy was able to use fire to protect his tribe from predator animals during the night 

was probably considered by other humans to have a high value 

and a guy was able to use fire to burn the grass 

to scare or kill enemies in warfare 

was probably considered by other humans to have a high value 

a guy that discovered fire and/or learned to use fire 

increased the survivability of other humans 

then that guy did indeed have a extremely high value for other humans 

and evolutionary pressures has continued throughout every generation 

every time a human discovered a new technology 

and every time a human developed a new strategy 

and that has probably affected how humans behave 

when they think that a guy has a high value

so if other guys think that a guy has a high value 

then they probably prioritize trying to protect him 

instead of being friends with him 

and if girls think that a guy has a high value 

then they probably avoid dating him 

so that his status is not damaged by womanizing 

but for a experienced eye it's easy to spot when guys avoid being friends 

with a guy they seem to like 

and for a experienced eye it's easy to spot when girls avoid dating a guy 

they are attracted to 

I don't know if or how these circumstances are applied 

if a girl is considered to have a high value 

because I have little to none experience observing that 

but it seems to be wetwired in human biology 

to have a strong desire to protect a guy 

that is considered to have a high value 

and because a high value guy is able to offer evolutionary advantages 

such as increased survivability to other humans 

then it could be assumed that other humans disregard factors such as 

race, religion, politics culture, traditions and other factors 

when they make decisions regarding a guy that they think has high value