@NorthernFrostCannabis I believe the idea of flushing (and I am neither for nor against) rallies round the fact that this is the only fruit you really dry and smoke! When the plant loses its water through drying and curing, the salts come out of solution in the cells and crystalise in the flower; this leads to harsh burning, sparking and the "Black Ash" phenomenon. As a counter (For debate only), you don't dry strawbs or anything else for smoking so there is no other real comparison out there (Apart from maybe some natural psychedelics or something similar).
The only close comparison I can think that shows how salts can affect the smoke/smoothness/ash colour/burning out is counterfeit cigarettes. If you buy a legit brand, light it and leave it in an ashtray, it will burn through with a clean white ash all the way to the butt. If you buy counterfeit smokes, light them and leave them in an ashtray, you'll see they burn to black ash and burn out way before the butt. This is "believed" to happen due to the fact that brands "poison" their off cuts and left overs of tobacco with Saltpeter (Potassium Nitrate - KNO3) and that's what the counterfeiters use when making their cheap branded smokes (The 'poisoned' off cuts that is). If you smoke tobacco and have bought the cheapo version of brands, you'll defs have come across this.
Suppose the idea of flushing is to make sure the extra Potassium you add during flower for boost or the nitrate used during grow gets used up so as there is as little as possible to crystalise in the dried product; giving a smoother and better quality end product.
Stress as well...It can be productive in growth of cannabis as we light stress it into flowering, LST and HST all the time for better yields (topping/FIMMing, bending, supercropping, etc.). Plus, studies have shown that UVB, which is a massive stressor to the plant, is one of the reasons resin is produced...its a UVB blocker so the plant makes it to protect itself from cellular damage - we just have to make sure we use the right stressors at the right time!
Again, I am in no way disagreeing with you...but its always good to have healthy debate around things! :)
Cheers for the answer and happy and healthy growing to yourself too! :)