mostly because no one has been willing to put up the money to pay for it,
Sorry but I recall the Federal government spent nearly a trillion dollars some 8 years ago to correct these issues, most of which ended up in the same pockets as before and very little repair or improvement took place.
The scientists also believe that the genetic understanding now gained will allow them to breed shorter, stockier plants that don't fall over as easily, and that these benefits could be gained without the use of genetic modification.
I guess plant splicing and selective breading do not count as genetic modification. Who knew? Must have meant direct genetic modification.
Perfection is acheived only on the point of collapse. - C. N. Parkinson