It is a preference thing. Some people love the vape they get from dripping, so they would rather fill up an RDA every so often. Often, most RDAs can hold a lot more
juice than a stock dripping atomizer, so the hassle of actually dripping is not as tedious as it is with a stock 510 atty.
With all of the innovations lately (the Kayfun Lite and the Ithaka (& its clones)), I kind of agree that you can pretty much get a dripping experience with the benefits of a
tank.
Lastly, you have not gotten true flavor/vapor production if you have not experienced a well built genesis style coil with SS Mesh. That, to me, tastes better than any dripper that I have had. Just my 2 cents.