The GMO industry has spent massive amount of money in CA campaign trying to counter it.
Are all GMOs bad for you? No. Some are. This law bundles them both together. Worse, California ag is so regulated for pesticides that GMOs have been a godsend to them. Take that away and Mexican or Brazilian producers will happily defraud you. Not only do local producers go broke, but the big GMO producers will corner what is left of the market.
Were I Monsanto, I would be putting money into anti-37 coffers just to sucker folks afraid of their GMO products. It puts Monsanto on an even footing with producers like Zaiger, who are busy simply making good tasting fruit that one can harvest all summer.