The leads me to wonder just how well developed the human brain is.We marvel at its ability to many things, but is it all we think it is?
See, I've always maintained sentience is an evolutionary dead-end.
No, really. Think about it.
Only the fittest lions with the best genetic code survive to the next generation because lions lame from some genetic mistake don't get mated with. Lions born with defects that prevent them from being incredible hunters won't get a chance to reproduce.
If a lion takes another mate? He kills her offspring by other males (obviously, they were inferior genetic stock).
With no 'sympathy' or 'pity' to weigh them down, all other animals will continue to 'cull the heard', so to speak, by having genetic errors fail to reproduce.
Not humans, though. 'Sympathy' and 'pity' can cause mismatches were one person with a healthy genetic code has kids with somone who doesn't. Or, people with genetic related disabilities having kids with each other.
While not judging any such behavior (we are, after all, all sentient and deserving of happiness), it does pretty much put a stop to human evolution. In the animal world, only the fittest get a chance to pass their genetic material on to the next generation. Humans don't work that way.
as often they are not atractive to others as mates, and such quirks will dissapear almost completely from humans
And, see, THIS is the problem right here. Assuming what is wrong with their heads is genetic, they WILL find mates and pass on their 'broken' genetic material. Either someone who feels pity for their case or someone with self-esteem problems who continues to get in abusive relationships.
(And, in any case, even if it ISN'T genetic, and just learned behavior, if they stay out of jail long enough to raise kids from the resulting union, that kid will end up just as warped as them)