I personally feel the reason why so many people argue is....(Drum roll) ENVIRONMENT!
I've met hippy folk who boast, "I never check PH, I just water those fuckers." When I check the water source, guess what! The water is in acceptable range. When people bost, "AN gives me better results." Is it the product? Or does their tap water lack CalMag, which was not offered by the competitor in a high enough form? So both parties are right. AN works for some people, and not for others. It all boils down to the 70 something elements plants eat. The more of them you have, the healthier the plant. How you get them into the plant is irrelevant. Organic growers utilize the most. Mineral nutrients CAN be equaled, but only a couple of them have enough without having heavy metal content, Etc. So just because YOU don't have to PH your water, doesn't mean it's not important. If YOU need a product for your roots. AWESOME! I'm glad you solved your problem. But for someone using a 80 litre pump with 2 8" air discs, your product may not be needed. Then you 2 argue for an eternity on the effectiveness of the product, when one person has enough dissolved O2, and the other doesn't. I'm not attacking any one or taking sides, just saying the person you are arguing with might have solved your problem a different way based on THEIR environment.
Have a nice day Sixers!