I would point out that it isn't unforeseen, given that genz don't drink, go out or do drugs to anywhere near the extent that millennials did at the same age. (https://www.statista.com/chart/30783/alcohol-consumption-by-...)
I would also gently point out the evidence for tempering alcohol only seems to be evident with people who have high BMI https://www.pulsetoday.co.uk/news/clinical-areas/mental-heal...
So yes, its worth thinking about how our economy is organised.
But the thing that is going to kneecap the US economy in the short terms are one of the following:
o Tariffs
o Cutting government spending (especially welfare)
o a steep rise in unemployment caused by government firing of civil servants
o fucking with the structure of the monetary system
o AI eliminating whole classes of jobs (taxi driving, phone centers, clerical work, etc etc)