if you have been pushing hard, might be fine to dial back a bit, but flushing at end of harvest probably has a net-negative impact albeit tiny in scale. you'll still have plenty of building blocks stored in a health canopy.
it doesn't reduce or cause a different mineral content in buds - fact. Rudimentart blind taste tests show people cannot distinguish between the two. Now, they can make up new reasons to be refuted, lol. it should be a red flag that the reasoning for the behaviour was 100% a figment of their imagination. then, they make up new reasons in similar fashion / same mistakes. the equipment and means existed measure this stuff... yet instead, just say it is so without evidence to back it up, then when refuted,just make up new shit you never said before, lol.