I think Oracle is spot on with his views.
Dependinging on what Steve Keen did with his funds he may very well be hugely better off, putting it in the sharemarket over the last couple of years would have significantly outperformed
That's really the crux of it. Renting is cheaper on todays comparison. It will be continue cheaper over the long term if you invest the savings wisely. The problem is most people won't do that and 20-30 years later they'll have nothing to show for the money they 'saved'.
If all you do is buy your own home and pay it off, at least you'll have an asset and this does give you some options. Even if the house isn't as much in real terms it still beats doing nothing at all.