FICO to incorporate buy-now-pay-later loans into credit scores

However, instead of using it to buy or construct a machine to triple what you can produce in an hour, the average person is using it to delay having to work that hour at all, in exchange for having to work an hour and six minutes sometime later.

At some point, you run out of hours available and the house of cards collapses.

i.e., credit can buy time in the nearly literal sense, you can do an hour's work in half an hour because the money facilitates it, meaning you can now make more money. If instead of investing in work you're spending on play, then you end up with a time deficit.

or, e.g. you can buy 3 franchises in 3 months instead of 3 years (i.e. income from the 1 franchise), trading credit for time to make more money, instead of burning it. It'd have been nice had they taught me this in school.

A mortgage isn't used to make more money. It's used so people can own a house after saving for a few years, rather than waiting until they've saved for a few decades.

Sure, without mortgage you may not be able to afford a house at all but it does not change the fact that mortgage is a "good" loan (i.e. you benefit from taking it)

The cheaper money (credit) is, the "higher" the prices will go.

It's not so much that houses became expensive, it's more that money to buy a house (specifically mortgages) became relatively cheaper. Low interest rates did that.