I think I can convince you that you're in fact wrong with regards to the 'easiest for a beginner' because you have not really given it a full analysis. Try and criticise my set up if you can or tell me what problems you think newbies would have with it.
I'll start with clean up. If you are a serious grower you are going to want to sterilize your equipment and medium. For anybody who doesn't know that means taking off all those sprayers and making sure they are not clogged, washing them, washing inside of the hoses, most people don't bother doing that every grow. Probably washing those containers. When it comes to the hydro balls you got two options, boil them or use something to dump them in to disinfect. You can get away without doing these things for a long time, but if you do one day it is going to bite you in the ass. So we are talking time and money. Where as with drain to waste you are ready again as fast as you can pull the medium from the pot and refill it with new medium. Don't have to clean anything.
Next I will move on to points of failures. Any pump will fail eventually. At least with your setup when it fails there is no real damage because your roots are in a Rez but it will fail eventual. The spray heads snap off all the time when you are cleaning them. Even that PVC Pipe will fail if you do it long enough. Even those net pots have to be replaced. Drain to waste the plastic pot will eventually have to be replaced as well, a decade?
Cost You can tell me how much that one plant system cost. I am guessing $60 to $80. The cost for drain to waste with pro-mix will set you back $8 for pot and medium. Over the years your system will cost less because it's the initial cost that sets you back where as I have to invest $12 every cycle for 4 plants. So if a beginner was to make 4 of your systems I predict it would set them back $120 compared to my $36, after 4 cycles Yours would break even and pull ahead. But again there are many systems out there much more expensive than yours.
Other costs This is not about your system but other dwc etc. Any beginner do a quick search right now in this forum for "water chiller" and "air conditioner" You will find hundreds of people who are trying to keep their water cold as to not get root rot. that's big money for a beginner and a waste of watts.
Root Rot You claim you cannot get root rot in your system. It's certainly hard to get it with sprayers putting that much o2 into the water, I agree. But I guarantee you there are people out there who have got rot in systems like you. I would also ask are you growing in 100c temps? Because many people do and with global warming it's only getting worse. Again, any beginners search for "root rot" and see how many people get it. Thousands and thousands of dollars worth of bud gone because they choose a style with inherent weaknesses. I am sure there is some idiot out there drowning their plants in drain to waste who have got root rot, but that's a special breed of dumb.
Noise makes noise when mine doesn't. Thank god yours doesn't have air-pumps, nothing is more annoying then that noise. But for real, if stealth is a concern drain to waste is as silent as it comes.
Ok so as you say, these things are not hard to learn, if you do it right you will have successful grows but why? Why do all that when you can grow just as much with drain to waste? You look around at all the people who built their own versions or try to improve on various methods and after a while you realize everybody is just playing. It's a fun hobby and playing around is fun, but has nothing to do with growing weed. You just only need a pot and medium. (well nutrients, pH pen, pesticides and all that jive)
It's like comparing a camry to a porcshe, one is cheap and reliable and the other is fast and sexy. But what if the Porsche was actually the same exact speed as the camry. Why the fck would you buy the Porsche? Just because you like it, and that's cool, I respect that. But beginners should hear that's all it is.
Now I am not an awesome grower, I don't invest the time needed to be honest. I mistreat them, ignore them, let shit slide all the time. After 20 years. I also don't veg long, 2 weeks. Obviously I could get more yield with longer veg but I like short veggies because I don't want to do all that training because I am lazy. Still I get about 0.75gpw on average with subpar clones. I know people out there who average 1.5gpw with drain to waste. So Yummy what is your gpw? Why is it worth it to do your style? Are you hitting 2.0?