nah, it was the effects of prohibition + depression that created the current standard of American Macrobrew = shit.
AB was basically the only player standing, with the type of distribution and production capable of reaching the entire market. As their depression era recipe demanded cheapness and availability--rice as a malt substitute as the grain supply of the US blew away with the dust bowl--the "American Standard" became tasteless rice beer.
wtf.
There was no market demand at all. It was what AB gives you, and that's what you'll take. It's quite easy to do that, though, when you consider that 10+ years of prohibition forced people into home brewing and distilling--people have become accustomed to a delicate "hairspray piquant" in their beverages, rice beer would taste glorious after that.
It's a shame, b/c AB really did make a world-class lager prior to prohibition and the introduction of rice, but never again. never again.
then, light beer became even cheaper. Then we create this image that it's cool, you can pound more and not get as fat! whatever. Nothing about choice, really.