This is actually a by-product of this community's (somewhat unhealthy) obsession with non-DPS jobs doing DPS. I've been in parties where healers will let me drop to an inch of my life (and sometimes hit the floor) to get that one more offensive spell out, I've seen tanks that never miss hitting that berserk button when it's up, but don't touch Foresight or anything else, all of it. I've honestly never seen a community so obsessed with healers and tanks doing DPS as this one, ever.
That being said, I'm one of those warriors throwing the points in STR, stance-dancing and swapping out gear when the situation warrants it. I agree that it's a fun way to play, but for the overall community it requires a commitment to the role that your average player isn't going to have. It's hard enough to teach people how to function in their own actual role without pressuring them to also do a job they aren't necessarily responsible for. I'm not surprised that those who embrace DRK have done it with the STR > all mentality because that's just what they have been taught by the elite tanks.