My business experience in the Green Industry, quite frankly, is none of your business. But it is significant. Do not "assume" when making your declarations: discuss from a point of view of strength. In other words back your statements with proof! This is something they teach you at University but I'm sure thru perserverance you will reach that level!
As for lawn spraying, its here to stay.........so get used to it.
The manufacturers of today are making products that target the insect itself. A "safer" product as opposed to Dursban, for example.
I hope I have enlightened you, good luck in all your future endeavours.