MoonDude
AUTOFLOWER ADDICT
Well you just described a self proclaimed "expert".... they are a legend in their own mind.
BUT, not all commercial growers are like that, and you will also find other personal growers that are exactly like that. They think they know everything and their way is the only way...
I know commercial growers who have the same goals for every grow that we would have (best quality, best taste, best high, best yield, etc ) they just do it on a larger scale and supply dispensaries.
Though science is heavily involved, IMHO growing is an art and subject to personal approach and touch.