You can be as prejudiced as you like about the Elton John family dynamics - unless you are in that nursery you don't know, do you? I would be extremely annoyed for you or anyone else to suggest that a child of mine was a fashion accessory. The same goes for John, I'm sure. Are you saying he has no natural desire for a child? How do you know?
Anyway, are you extrapolating from the BBC interview or was that the main thrust of the discussion? I didn't see it so can't say.
Statistics show overwhelmingly that children don't thrive in families where there is neglect and abuse. Nothing to do with gender imbalance. Children learn self esteem from healthy relationships where they see respect and they feel valued.