You're suggesting that parents are some kind of limited special-interest class, as if we're snowboarders asking for powder leave, rather than the overwhelming majority of people. The question of how we treat parents is really a question of how we all want to treat each other -- whether we want to give people support when their children are born, or whether we would prefer to force them to choose between work and family. Furthermore, since this is a discussion about paternity in particular, speaking out against paternity leave is speaking out against women working outside the home. I regard this as a very regressive position and unjust to women.