no, using plain water the last week(even the last 2 weeks) isn't "flushing", that is just called watering.
tapering off feed certainly isn't the same as flushing because you are still feeding your plant......
Until the last few years flushing always referred to "running large amounts (3x the container volume was often recommended) through your medium to remove nutrients, some people even suggested doing it multiple times. That is still the definition when talking about fixing a nutrient issue or salt buildup. However in the last 5ish, maybe 7 years some people have tried to change the definition to avoid flushing debates, or because as they learned the science and realized that pouring massive amounts of water through your medium wasn't helpful but they still had to justify their cognitive dissonance. Flushing is not the same as watering with plain water or watering with lighter nutrients.
Since I typed this all out already I might as well make my stance clear on the subject. I've done multiple side-by-sides with clones in the same environment where flushing was the only difference. I've mostly grown in hydro, but have done some soil runs as well, and I have grown well over a thousand plants at this point of many different genetics. I understand the process of how plants uptake and USE nutrients to grow. I don't flush plants at harvest, it's pointless.
Flushing is only used for correcting a severe nutrient issue in the medium. Flushing a plant can absolutely damage the root system and stress the plant delaying growth so it should only be done if really necessary.
Tapering feed and watering according to the plants needs won't hurt anything at all, and promotes a healthy plant all the way to harvest.
Grow your garden however you want to, its your garden
. But the best buds come from healthy plants that are grown until they are fully ripe and then dried properly to ensure a quality smoke.