If I'm riding and going downhill or relatively flat I will pull over for a tractor or pretty much anything to pass.
The lanes round here are narrow, and you don't want to wobble into a brambly hedge.
If I'm tractorising I will nearly always pull over for a cyclist, unless I'm about to turn in.
I'm rarely in that much of a rush.
But the contractors are up against every minute.
From an economic, client, and weather POV.
My tractors are relatively modest by modern standards.
I agree the big beasts are wayy too big for most little lanes.
But farming has been mostly pushed that way, by many factors.
These guys look like they are on their way to, or from sort of old timers rally.