Critical difference.
The great depression was because America went from a producing nation to a not producing as much nation.
We already are now a non-producing nation. Any change will mean more jobs. Not less.
Do you thinj that it will happen overnight and where will the moeny come from the build all the factories for these new jobs? We are broke.
It might happen just as you say, but it won’t happen over night and you will have to make do until it does.