Think of 2008 as a primer. A very difficult and disruptive primer. Nothing’s “fixed.” Markets never really cleared.
Additionally, as is explained below, the now 0% interest rates are almost locked there as the cost of serving US debt by the US government would explode upward with increased (and very likely closer to real market level) rates. That’s a sticky place to be to say the least.
But people will continue blissfully along, until they can’t.