Maybe where YOU live, but all of the farmers in my area are always fighting the clock. Hay has to be mowed, dried, tedded and baled, while hoping the rain doesn't come. Cows have to be fed & here, rented pastures can be miles apart.
Since I really like to eat, I have all the time in the world when it comes to giving farmers the right of way. Because I live in an agricultural area, I give myself extra time to go anywhere. There aren't many shoulders on curvy mountain roads, with few places for a tractor to pull to the side. Farmers here DO pull to the side to let other vehicles go by, when and where it is safe to do so.
What is " tedded "?
Tedding is a process to help the hay dry faster:
Tedders: How, Why and When to Use Them | Makin' Hay
the basics of raking & tedding hay - YouTube
I am an extremely patient guy, but I get annoyed as Hell when one of those guys driving slow moving farm equipment has a string of cars backed up behind him and won't pull over every 5 minutes or so to let people go by. The farmer typically has all the time in the world, but a lot of people have to be at work no later than a specific time where someone keeps track of when they show up.
I used to drive farm equipment down the road occasionally, and I would pull over to let people behind me pass at every opportunity.
It's just good manners.