Earlier quoted context omitted.
But the deposit is a massive issue. If you put that deposit into stocks and shares (a diversified portfolio) you could (will probably) find that outperform the cost of your mortgage and maintenance together. If they could get rid of the deposit you might break even with a stocks and shares investment plan. https://www.thebalance.com/real-estate-vs-stocks-which-is-th...
Are you advocating for zero money down mortgages? That’s what causes market crashes.
If you had an oracle that could predict with 99% certainty whether a given housebuyer would make a certain size of mortgage payments, you could afford to lend them that amount no matter the size of the down-payment, with a 1% risk premium over your interest rate.
We don't have such an oracle, so we look for other signs. One of the signs of financial stability is the ability to pay a large fraction of the price in advance.