Evolutionary pressures aren't as simple as "if it lowers your chance of reproducing it's bad." You can read "The Selfish Gene" for more info.
Consider a gene that promotes compassion, selflessness and sharing. While it may lower your individual fitness, groups with some individuals with this gene may fare better as a whole.
Same as autism. For example, say autistic people see connections that other people don't. Having a low rate of "different thinkers" is positive for the group as a whole, even if the individuals may be disadvantaged in other ways.
Consider a gene that promotes compassion, selflessness and sharing. While it may lower your individual fitness, groups with some individuals with this gene may fare better as a whole.
Same as autism. For example, say autistic people see connections that other people don't. Having a low rate of "different thinkers" is positive for the group as a whole, even if the individuals may be disadvantaged in other ways.