No company in the US is allowed to genetically modify a crop to produce non-viable seed. However, they can legally forbid farmers from collecting seed and planting from those seeds because farmers do not “own” the genes in the plant that they are planting.
This is indeed really weird and questionable and I don’t think anyone 100% understands how that is affecting and might continue to affect food systems. So, yeah, I think there are issues with GM crops…they have to do with policy and government and law and economics. But the fight I end up fighting with anti-GM activists tends to be more alarmist “GM Food is Dangerous for Human Consumption” which is just not even a tiny bit true.