Interesting questions and even more interesting replies.
I have an old Mitsubushi or Satoh Beaver with a tooth bar, actually my father in law built it and he called it manure forks.
I know that he used the little tractor hard for 20+ years. I used the tooth bar to work up some really hard ground that had been a road bed for 30 years. I ramed the forks into the dirt and drove forward as slow as it would go and rooted all I could. The backed up with the forks all the way back into the same place. It took three or four trips to get it down to 4 ". I do not see any problem with that little old beast.
I have a new
B21 Kubota that has just finished grading for a 3000 sf shop floor, a 1500 sf pad for a mobile office and 2500 sf for a new house. I used the FEL completly back to shave off the hard and high spots on each of them.
I spent many years in heavy construction with back hoes and big Cat and Michagan loaders, they are all used like that.
Perhaps some of the little light weight tractors will not hold up, but the little beaver is about as small as they get and I would not hesitate to use it again.
BTW, if you wet the ground down for a few days, it will make it all work better.
Curt