Planting commercial crops where conditions are naturally conducive to success is obviously advantageous. This would be a more widely adopted practice if those same amenable conditions weren't even more sought out for construction "development." Burgeoning human populations also negate the likelihood of meeting demand by growing crops only where conditions are ideal for those crops.
Modern transportation has facilitated the transport of live plants, seeds and cuttings throughout the world, to try to grow these in new places. This is great, but only when these are transported cleanly, free of pests and diseases.
Unfortunately, modern transportation has also facilitated the introduction everywhere of diseases and pests of the whole world. Where-as each region used to have several plant pests and plant diseases of its own, now crops have to deal with pests and diseases from distant regions as well.
Government procedures worked pretty well to protect against new plant problems being brought in, for several decades in the mid-1900's. Then priorities changed to mainly urban interests: moving multitudes of people through facilities quickly, and spot-checking for drugs, guns, explosives, and money--- ag inspectors are still present, but... millions of passengers are just waved through, often with plant materials.
The disgusting results from this are most clearly seen with Citrus trees, which used to be dependably easy to grow, and now nearly impossible, without agritoxic chemicals several times per year.