If mankind started out without any negative traits that like greed, ego, anger etc., how would it shape our civilization up to this date? Would we have created the perfect utopia or made ourselves extinct long ago? Are our flaws holding us down or are they the reason our society made it to this point?
Flaws are just variation. Variation begets adaptation. Adaptation begets survival of the species. Without flaws, evolution wouldn't exist and life wouldn't exist.
And if somehow we overcame all these "flaws" everything would be so incredibly boring.