1: I am aware of the importance of insects in the food chain. I know that many animal species, like small birds, feed on insects. I fully accept the consequences. The extinction, or near extinction, of insects is worth the disappearance of some animals.
2: I'm carving an exception for bees. We need bees for pollination (for now).
Just take wolves for instance. Lack of wolves lead to a huge population increase in deer, less trees, less birds, less beavers, more floods, less biodiversity, worse rivers, more erosion, etc. That's just a small sample, there's been several papers published on it if you want to know more.
It wasn't until we reintroduced wolves that we had any idea.
The bottom of the food tree (plants, plankton, and related) are required for life on earth... even us. You can't just pick bees and let the rest die. There's dangers in larger mono cultures. If we just keep the most productive bees for pollinating our food the diversity will be radically decreased and the parasites, fungus, and diseases will become ever better adapted.
Much like what's being fought over the most popular banana, that experts think is doomed because of the huge mono culture and once a fungus becomes adapted will spread through out the supply chain and doom any attempts to raise that same banana.
Sure we might be able to add more poison, genetic engineering, and other high tech solutions... at a cost... or maybe we will try and fail.
As the load of agriculture on the ecosystem increases very bad results are more likely. Just this week I read something on the use of Neonicotinoids use in rice fields in japan having a huge impact on the fisheries. Apparently getting rid of those pesky non-bees lead to a fishery collapse because there was nothing left for the fish to eat. Said fish weren't eating those non-bees, but the chemicals did impact what they did eat.
(#) I am not a doctor, so this is can not to be taken as professional advice/recommendation but rather as something that common sense dictates.
With the risk of the total collapse of the bottom links of the food chain and everything that follows, calls to prevent complete disaster will be met with replies of, "no they're icky I don't care."
How can someone just not care about the sheer amount of scientific understanding and discovery that would vanish if all insects died?
Oh well.