Because I’m not. Especially since I found one that was spectacular and new to me just tonight.
This one was along our rock road, and was obtaining nectar from a weedy prairie plant called hoary vervain.
This bee fly is quite a bit larger than other bee flies I have been seeing, and has a very loud buzz while flying.
Like other bee flies, it hovers in place while visiting flowers.
The roused bear 
I for one am definitely tired of bee-flies, they are fascinating and your images are amazing.
Sorry, that was meant to read ‘definitely not tired of bee-flies!’