Equality of opportunity means in a strict sense external factors, in an even stricter sense things that can be changed by policy. Otherwise, it would be asking

Equality of opportunity means in a strict sense external factors, in an even stricter sense things that can be changed by policy. Otherwise, it would be asking for all people to be born with the same mental processing potential. Which is absurd, which I guess is your point. But it isn't that absurd if you define opportunity as "things society can actually do for the individual".