Big companies use more dilute forms because amount of error with active ingredient will be less at hihger volumes than lower. Goes like this. If a guy is tires and puts down 5 gallon/k instead of 4 gallons its a 25% over app and probably not gonna hurt. If a guy puts down 3 instead of 2 gal it's a 50% over app. The converse is true on under app. You could be ineffective or phytotoxic depending on which extreme you go to. If you are steady Eddie, lower dosages ar OK. Sometimes with contact fungicided or insecticides more volume equals better plant coverage to a point. On systemics which are usually more root absorbed than foliar absorbed lower volume is not a problem except for a phytotoxic effect. I've sprayed a lot of plants and turf with low volume app (1.5 gal/k with liquid fert and weed control) with ZERO problems. I've sprayed fungicides at a quart/K and achieved control.