cos this is probably the only outlet they have to emcee and what not (well, there main outlet anyway)....while the more seasoned and 'better' emcee's have been rapping/still do rap in the streets and with there bluds all the time....better communication..face to face...voice to voice...etc. etc...its easier to elevate 'on the streets' with your bluds or jusrt some next peeps calling you out...than on the net...(not saying you cant elevate on the net).....

...cos also people are more tempted to do more textcee while on the net than emcee in audio...because its easier...cheaper...while when you're with your bluds person to person...on the street, at home or wherever...you gonna be using your mouth more than just writing....

....or something like that....not as eloquently put as it could have been....but i think you get the picture of what i'm trying to say....