this is going too far, isn't it?
This person is completely out of control.
I think one day I will read a fascinating paper on the psychology of Internet forums
Not sure why
@Nebari got so mad in the first place, but to continue to argue with someone about their online attitude is a waste of time, in my opinion. If he wants to alienate people, so be it. I'm sure he understands that he is being obtuse - we just don't understand why and perhaps he doesn't want to tell us
That said, I agree with
@rockm 's point of view, which is that this tree isn't worth the time unless there is some hidden value in it that we don't understand. I go back to my bonsai mantra, which is - always start with the nebari and base of the trunk. Those are the hardest things to develop and take the longest time to change. This tree has a compromised root system, and half the roots may in fact be completely dead. The trunk doesn't have any movement at the nebari, doesn't have any taper, and may be problematically difficult to get to thicken up if the scar gets in the way of your development plans.
Stepping back for a moment and considering the source material, cherries are generally developed as bonsai for their blossoms. Culturally it is an important tree to the Japanese, and is a literal example of the Japanese aesthetic of Wabi Sabi. The cherry trees in Washington DC were a gift from Japan to the United States (at least the first 3000 or so were).
Naturally, cherry trees grow in an informal upright style. They are prized for having a graceful, almost weeping growth habit. I have personally never seen a formal upright cherry, and I think you will have a hard time styling a cherry in a more extreme, masculine style like windswept because it will be difficult to make it look believable - being a deciduous tree on one hand, and a delicate flowering species on the other - one which would not in nature put up with the extreme environment that would create a windswept tree. These are my opinions because I'm not saying you CAN'T style a cherry as a formal upright or a windswept - just that it I don't think it would be the appropriate style for the species.
Since the OP has enough experience to be able to successfully graft cherry branches (not the easiest skill to master) I would think that he would be able to come up with a better solution. A possible approach that hasn't been suggested here is to just go out and find a cherry with better nebari and trunk base (perhaps even a nursery tree) - and then graft your nice cultivar branches down low and grow a new trunkline (and primary branches) from the grafts. You would be years ahead of trying to fix the current tree.