Well sure, there's a reason, or maybe several reasons,
but what are they?
Better performance?
Longer lifespan?
Shorter lifespan?
Lower emissions?
The OEMs used to recommend higher ratios of oil, and there's testing numbers that indicate a 2-stroke will make more power the more oil you add, up to about 16:1. Adding a little more to a gallon of fuel doesn't really change your tune much, you're only changing the amount of fuel in the mix very little, but you can add some extra lube to the bottom end, which isn't a bad thing
.