flushing for a harvest is an urban myth perpetuated by ppl that hypothesized why it helped, then never proved it. when it was tested, the primary reason - reducing mineral content in buds - is fairly confidently shown to be false. blind taste tests show ppl cannot discern between flushed and unflushed...
this truly is the case of the emperor has no clothes... those that cling to it is yet another example of similar behaviour repeating throughout history ad nauseum. (... and, many more doomed to repeat it in future)
when someone gives a list of reasons, then has to rescind those reasons in the face of experimentation, then chooses to make up new reasons not mentioned previously... it should be a giant red flag with neon lights flashing around it and a big 'ol lit up giant arrow blinking on and off next to caption that says "bullshit"
as far as darkness.. supposedly an informal test was done and they did test for potency, but did they account for mass lost? deprive a plant or human of food and it will lose mass (aka weight in common terms, which "weight" is really measuring gravity) So many variables to accont for that 1 sloppy test isn't enough to be confident (unlike mineral content of plant mass which is easily discerned with black and white results). also, just how much is 1-2 days going to impact a plant that's been ripening for months? talking few percent even if it does help.. a few percent of 20-something percent? that wouldn't even increase potency from 21% to 22%. is it worth the risk to do something that's a maybe? whereas 1-2 days of darkness definitely has a negative impact, even if also small.
in the end.. a lot of what ppl do is more about making them feel better and not much value added to the garden, lol... lots of "Bruh Science" out there....
bruh, really.. c'mon... i read it on the internet.