Well I tend to agree with the dumping large quantities of water. When I refer to flushing, I simply mean feeding the plant the same amount of liquid, that is simple water, with no nutrients. I admit I didn't state a difference between the two before, and that was my fault. And thank you for agreeing with me about the rainfall, I didn't claim it was the same saturation level, just the fact that it happens, as I stated twice before, but I'm sure you read that already.
No, what I said was they don't use the same nutrients, that require a flush. If you disagree with flushing that fine, but please endeavor to understand what you are disagreeing about. You focused on the word "concentrated" because you are just trying to poke holes, not understand my reasoning. So I will go slowly this time, and repeat what I said before that you may have missed.
Farmers have regulations on what they can and can not use.
Marijuana growers do not.
Most Marijuana nutrients are classified for "ornamental plants" that are not meant to be consumed. This is why I believe it requires a flush of sorts.
But I do tend to agree, drowning your plant is not the answer, I think a controlled flush should be used, consisting of a water-only diet during the last week or so. This means watering it, in normal amounts, with no nutrients, just water.