I think it would be best considered as having limited utility, but folks who need a quick sugar boost like diabetics and endurance athletes can take advantage of sugar's characteristics.
Not everyone in the west is a fattie. I am pretty skinny and wanted to gain some weight fairly rapidly a few years ago, so sat with a 2L bottle of soft drink beside my desk at work every day for a couple of weeks. It worked a lot better than my previous attempts of just "eating more".