Scale matters also, especially in relation to pot selection, because trees tell a particular story no matter what our wishes are.
The reason this tree needs a more wide shallow pot to indicate expanse of landscape, is because of this scaled look of age to it's absolute physical extent. That look comes first, then we choose a pot to accentuate it, or give it the context it needs for that to make sense.
Should one cut all the branches back to a third, bringing the foliage in extremely, and jin more of the Apex, all of a sudden the tree utilizes a smaller pot, indicative of a smaller pocket in harsher terrain, and the higher jin makes sense, because it is not at peak health, so it will not have grown to peak extent.
It's arguable that this tree has some "wiggle room", but I'd say it represents peak physical extent to about 90-95%.
That 5-10% just isn't enough to make the jin make sense.
Artistically, I think the fact that it is a large pointer to this trees greatest "flaw" is more a reason to cut it off anyway. If we argue that, we have completely failed as a community to give bonsai advice.
Sorce