Earlier quoted context omitted.
Because real estate always goes up? The "houses are the greatest investment ever" myth is amazingly persistent.
I am also skeptical of the conventional wisdom of home ownership. I think a mortgage is simply a way to force yourself to save money. If people save with the same commitment as mortgage payments, even while paying rent, they should end up doing just fine.
Mostly it's about even.
But just as you say a lot of human elements come into play. People choosing a rental or a purchase choose radically different properties so usually saying 'I would be paying this rent' is meaningless since you would be living somewhere completely different paying different rent. And saying 'I would be saving X' is also meaningless because you probably wouldn't be.
I think these usually outweigh the pure financials. many people purchase houses that would have never saved a dime. But of course, that's beatable.