Thanks for the question.
I don't think we have the luxury of legislating organic foods. There are a number of concerns there, but the biggest one.... You started your question off with Sri Lanka. What occurred in Sri Lanka was that essentially the agricultural system fell apart when they stopped using fertilizer and at least certain pesticides.
We have to make prudent use of fertilizer and pesticides. This is to be taken as a serious matter, but we can't simply do without. I would direct you to some of the research done at the University of Manitoba, in which they found that globally, 40% of the adequate diet based on protein can be directly mapped back through to the Haber-Bosch process that produces artificial nitrogen.
There's a certain group of people who can afford organic food. These are personal choices, and I don't advise people on personal choices. However, I believe that the idea that this is a widespread solution is incorrect, in my understanding of it.