Failure potential + Size of part + Target rating = Hazard rating
The failure potential is certainly there, but unless someone was having a picnic in a blizzard in July directly in the path of the leaning trunk, it appears from the pics that the size of the part that could fail and the potential target would not justify removal. Would be a shame to remove a historic tree because it could break a fence. Maybe the initial arborist was in a hurry to get to his next stop.
Although I have done some limb propping, I would not recommend trunk propping unless the target rating is very low and the part size at altitude is not large. Should sufficient force be applied to the upper crown at a 90 degree angle to the prop, failure could occur as if the prop were not there. Worse yet, it could send the tree off in a direction that was not anticipated. |