Upspeaking and Vocal Frying

IF YOU WATCH TELEVISION in America, or go out much, you've heard people talk using "upspeak" and "vocal fry". Both are becoming scientific terms, describing America's current conversational fad. Making declarative statements with a gradually rising pitch is upspeak, and ending sentences with a slight raspy tremor, a roughness in the voice, is vocal fry. Both are much in vogue right about now, and many people claim to be annoyed by them. I'd say I'm at least as fascinated as annoyed; positive attitude, and all that, you know...Also, I seem to notice the tendency more in young American women than any other group, and apparently, I'm not alone. Some claim, however, that these vocal patterns are widespread through many groups, and that young woman are simply being singled out, which sounds plausible, but still, it just seems like young American females, particularly those intellectual and well educated and upper middle class-ish, really do it a lot. The question, to my mind, is: "why"? Good old fashioned imitation, conformity, status seeking within a community of similar people. Or something like that. All primates are highly imitative, and status seeking. socially. Are upspeak voice fryers - and those who do one always seem to do the other, its either both or neither - merely trying to add emphasis to their spoken words? If so, why not simply speak louder, or throw in a few cuss words for emphasis? One reason its interesting to me is, throughout my entire life, from early childhood to this very day, no matter what other people are doing, no matter what's in style - I want to run away from it, and do just the opposite. that's why, for instance, I'm not a christian, or one reason, anyway. Its also why I like to wear long hair when everyone else is wearing short hair, and the minute smart phones became too popular, I ditched mine. I just can't stand running with the herd. So therefore I need to remember to keep my sentences on an even or a downward pitch, with the ends of every sentence spoken clear as a bell.