[sershe]

Even accepting that there's no moral difference between those scenarios of "parents mattering" (which I do not, but that is a separate argument), in one system someone becoming say a doctor depends more on their parents giving them an "IQ gene", instilling good work habits, and giving them access to good medical education. In the other, non-meritocratic system, it depends more on parents having power and connections. One of these still produces outcomes that are way better.