I have two personal example. Despite my reasonable arguments my family invested close to 1 crore (10 million) Indian rupees in property for a meager 3% per annum returns in rental income. I feel the pinch because a significant part of it is my hard earned money. Sometimes you just can't help it.
Then there is a friend who is buying another flat because he has accumulated some money by living outside India. He thinks he will sell it at a higher price in couple of years.
Any evidence based arguments about history of real estates failures are simply ignored. Everybody thinks this India is different.
Reason just fails when competition between neighbours takes over to hoard more and more.