Sometimes I'm not sure whether you're an idiot or you're just playing one.
Obviously you don't lower and increase your pH at the same time.
You can find their MSDS and call them for ingredients, just like I do with any new product.
Yes, a company will try to sell you extra fertilizer, just like your chemical companies make an orchid formula, a african violet formula, a cacti formula, a rose formula, a evergreen formula, a grass formula, etc. If you know anything about horticulture, you know you can use any of those or even 20-20-20.
Knowing by experience that A+B is just a simple pure and chelated chemical nutrient solution, and it works fine, is not marketing. If I were to use some blue soluble off the shelf fertilizer, I'd likely get many issues due to it being an unrefined contaminant laden non-enthusiast (clueless) consumer product. Hydroponics require pure salts due to pumps, misters, various irrigation equip being prone to clogging. Flushing acid through piping is a VERY tedious chore.
Now, I've worked in hydro greenhouse complexes bigger than your farmland UB, and I know I could just buy the individual salts, calculate a ppm formula and have my own pure nutrients for a fraction of the cost: except time spent and material necessary, not to count warehousing space... It's not as time efficient.
It's a good product to use without additives, in a hydroponic medium.
I understand you're against cannabis marketing, and so am I. The problem is you're so extreme on it you're like a fundamentalist refusing to hear nothing but your own doctrine, even when you're horribly outdated by cannabis-unrelated horticultural documentation. That tells me you're either a moron on purpose, or some ideologist stuck in his ways. It's a hard call.