Crony capitalism at its worst. Craft beer must be taking too much market share from the bigs. A standard 12 oz beer has a maximum of about 230 calories. A standard 12 oz light beer has about a 100 calories.
That is more than enough calorie info for a person drinking beer. A chemist running tests might want more accurate info, but normally it doesn’t matter.
Craft brewers are a drop in the urinal compared to the big boys.