Con, possible loss of potency.. shouldn't be too bad. Pro, you don't have seeded bud
Con, you may not have time to flush, pre-chop. Pro, there are other ways of flushing, including cutting the plant at the base, taking the plant to a separate room or closest, and propping or supporting it upwards while the stalk rests in a vase or bucket of distilled water. The plant can even continue to form new growth in this fashion, but when trying to flush it MUST be distilled or pure RO water because the root system is no longer in tact to give the plant a bit more control, over what goes in and what doesn't, filtering out some of the salt and debris.. it functions via the capillary action of the stalk material, drawing moisture upwards. You'll notice you have to replace some missing water each day, sometimes several times per day if the plant was particularly healthy, vigorous and well-fed before the cut. Another option is a water-cure, once you've harvested the buds you allow them to dry, then submerge them in distilled water, changing it out with fresh water every day for up to a week. The flavor is somewhat diminished (why I prefer dry flushing with the stalk intact), but the potency stays, and the nutrient and other salts are gone.