> the people buying houses in the outer-inner-suburbs that would still be vastly outside their price range without massive help from both sets of parents; these buyers are unfailingly couples.

I suspect there is a big difference between the long term wealth implications of buying a house vs buying an apartment. There are never going to be more houses in outer-inner-suburbs. There is going to be a constant supply of new apartments as we move towards higher density living.

People who have wealthy parents are in the best position to make better housing investments.