But it was obviously really just massive government incompetence. It has been known for decades how to transition to organic methods successfully: incrementally, and with education. Both skipped.
After a sensible transition, yields could be lower, per acre, but not necessarily. Money spent on fertilizer and pesticides would be much lower than that. Money previously sent abroad would have stayed in Sri Lanka, milling around in the local economy generating prosperity.
Now they have chaos, and it will take a long time to get back to their previous, precarious state, probably in hock to China. Dow and BASF will get themselves well locked in; other countries will be spooked. A big success, for them. Not so for Sri Lankans.