Calling that nepotism is a stretch imo. There is nothing wrong with borrowing money from your parents for a down payment just like there’s nothing wrong with your parents paying your tuition.

The problem you highlighted - luxury development - is a significantly bigger issue. And that’s less of an issue than corporate landlords.

Then there’s private rentals which I’d say is the biggest factor involving individuals (not companies)

But a 28 year old borrowing money from dad is a drop in the bucket. It feels unfair to me to place any blame on them at all