Maybe you are right - I have friends who grow massive amounts semi-legally under medical. Their help is terrible, so a nutrient that mixes to a good enough ph and works ok from the label on the bottle may make the difference.
Many of them run GH one-part or lucas. Once again, to remove as many variables as possible. The biggest issues for them are theft and power outages. They do not “dial in” anything… large ac units, some pots, some pumps, some food, and some very sketchy electrical panels is the name of that game…
In this situation I do think AN helps, and a few of them do use it.
But you are very much correct that heavy marketing may be also targeting homegrowers’ disposable income. I have never seen that show - did the plug their product?