Yes, air is important but not that much is needed.
The bag of trail-mix I got from our vending machine is clear at the bottom so you can see what's in it but the rest of the bag is yellow 'n orange. Mr. Nature is the company for anyone (which is nobody) who cares. Funny thing though, that when you open the bag...the product is just above the yellow coating. So, they don't use air for cushion and they use they cover the bag so you can't see you're getting screwed.
You can't see the net weight in the vending machines so my claim DOES have merit.
Anyway, the point is you know the bag is 1/2-3/4 full of air before you even buy it. This doesn't bother anyone else? Slaves to corporate law I suppose
Let me guess, "If it bothers you, don't buy it." Didn't want a candy bar and there aren't any other choices