They're not using them to deliver roundup. Instead they are spreading organic controls. An excerpt --- Both bumblebees and honeybees have successfully distributed the fungus Beauveria bassiana to greenhouse sweet peppers and field canola. The fungus kills pests like whiteflies, aphids and Lygus.
In this thread, we explored the idea of bee immunity to poisons, working to keep chemical farming alive.
https://permies.com/t/27213/bees/Honey-Bees-Work-Monsanto-Roundup
The Windsor area has a mild climate due to the moderating effect of Lake Erie. There are thousands of acres of greenhouses and of monoculture field tomatoes.
Bees are constantly in contact with agricultural poisons. Involving them in processes that compete with that can be a good thing. This species is a disposable asset of the mega farm. I would welcome any development that puts them to better use. The current state of affairs isn't good for us or for the bees.