I think I'm trying to say, talking about how farming practices have harmed American honey bees is a little like talking about how farming practices have harmed dairy cows.
I get what you're saying, and what you're saying is factual, it's just not useful information. Pesticides at least are a clear cause of hive collapse, and lumping pesticide use in with the larger monolith of "farming practices" only serves to obfuscate the problem.
No one is arguing that we should throw out all of modern farming practices, so there's no need to jump to their defense.