True statement.
As I've said before, if Lamb of God was a bunch of long-haired Swedes, they'd have a different following, even though the music would be the same. Same is true of a lot of bands. However, I think this has as much to do with time, as going against the trend. People have limited time with which to investigate the overwhelming amount of music available. If you don't like any of the bands you've heard within a given genre, you'll likely just ignore the next band that comes around who's tagged as being of that genre. Or, you'll listen to them, but listen with a "glass half empty" mindset.
Maybe Lamb of God would have more Eyehategod fans or something. I don't know. The band's music seems very within their chosen genre.