I was young too, but I think the .com bust was far more obvious than the housing crash which snuck up on a lot of people.
TV is TV, but that was genuinely happening. The market was just completely broken.
I was young(ish) at the time, but I imagine some knew housing wasn't sustainable. I'm not sure there were many outside the stars of The Big Short quite knew how vulnerable the entire banking system was because of housing before it all came down.
The crisis with the housing criss wasn't that housing collapsed, it's that the world economy went along with it.