This all is potential, but also seems to be based purely on your own opinion. Are you referencing a scenario that already happened in a different country?
ABCD in Japan prior to ww2.
Chile prior to Pinochet. Chile is agriculturally rich but suffered food shortages none the less.
Neither is exactly this scenario but there are enough similarities to suggest likely outcomes. People don't typically "toughen up and deal with" severe and abrupt changes to availability of common household items, and even countries with the potential for self sufficiency often have painful transitional periods.
So ya, we do toughen up, and no, china doesn't have much leverage over the west at all, even less than the Middle East.