Organics are important not because GMOs are the enemy but rather because the land use change is inherently bad for all life in that area. GMOs don't have to lead to monoculture crops that span acres or rampant neonicotinoid insecticides, but they often do, and it's precisely at that point we can see drastic changes in a biome's stability and therefore the health of bees among many other pollinators. That's why we need to be talking about insect numbers at large and not only bees.
The study of biodiversity has an extremely difficult time modeling these kinds of changes, and that's probably why many scientists won't go to bat against this kind of land use change. A self-respecting scientist won't say that converting croplands to monocultures ready for insecticide use lead to biodiversity die-off because it's hard to actually track the fluctuations between species. It takes so much time to collect data to analyze before we even get an inkling of the interplay. We understand so little about the microscale interactions and how it fits into our larger understanding of agriculture and land development.
For those who think this is all overblown and alarmist, go sit on the grass -- if you can find a patch -- and stare at a spot until it comes alive. Things are moving around and teeming with a multitude of species of plants and insects. The reality you see escapes unnoticed until you stop to think about the ecological systems that underpin our fragile existence. Our health depends on a functional biosphere. If we cannot figure out how to share the earth with its other inhabitants, what the fuck are we doing going to Mars?