You say evolutionary biologists are generally puzzled by why love exists....let me tell you that this is also wrong.
It is widely accepted that love exists so that people stick together in larger groups than a single individual. Just like how you have a pride of lions, a flock of birds, a herd of cows....etc. being in larger groups increases the likelihood of survival.
As for the simplistic view of what love is....why does it need to be any more complex than it is? Why do you have to complicate something for your own satisfaction? Just because you are unsatisfied by an explanation doesn't mean you make up your own....of course I know love is more complex than JUST a chemical reaction, but that puts it in a quick and simple yet correct way.
It is widely accepted that love exists so that people stick together in larger groups than a single individual. Just like how you have a pride of lions, a flock of birds, a herd of cows....etc. being in larger groups increases the likelihood of survival.
As for the simplistic view of what love is....why does it need to be any more complex than it is? Why do you have to complicate something for your own satisfaction? Just because you are unsatisfied by an explanation doesn't mean you make up your own....of course I know love is more complex than JUST a chemical reaction, but that puts it in a quick and simple yet correct way.