it could be huge to all growers but why is everyone so upset about GMOs anyways?
Because for farmers, it means that they can no longer save seed to plant next year. Even if they never bought Monsanto seed and have saved their own seed for generations, eventually the GMO genes get into their grain through wind polination. Then they must pay Monsanto every year.
There are also non gmo seed protection laws out there. I guess so that the developer of a variety gets a return on their investment.
For the varieties that are hybrids, there is another reason not to plant saved seed from that production. The new generation will mostly revert back to the original parents’ characteristics and the resulting yield usually ends up in the dumpster.
For some varieties that are not hybrids, there are areas that allow us to replant that variety only for our own use.