Big boy farmers here (and every place else I've seen) use a bale "grabber" not a grapple, different tool completely, OR they use an end loader with a bale fork.
Depending on the definition of "tinker toy tractor" you are right, but that isn't how I define one, and I have both. AND just for the record, we hay with bigger tractors than I most often show, too...
Quick example: I have a 6' rotavator, I've shown it many times. I also have a 30hp Deutz "farm" tractor. Over the years, I've put 500 hours on that Deutz custom rotavating with that rotavator.
At one time I bought a 30hp Kubota compact tractor, it seemed nice enough and after a time I decided to try the 6' rotavator on it. Worked OK for smaller gardens, but there's NO WAY I could take it on field jobs, it just didn't have enough nuts to be used for hours and hours on end in field conditions on jobs.
There's the classic difference between a farm tractor and a tinker toy compact tractor!!! They make them with lots of hp, but they just can't compete with an equal hp farm tractor for long tern field work or last as long doing that work.
After a few more "things" like that, I sent that Kubota down the road. Would have make a good play farmer tractor though.
I have compact tractors, I just don't try to use them for real farming... lol
SR