Nope, you lose credibility when you get utterly roasted by your own peers and when you suck. I direct you to Common's "Sweet" on the YouTubes. Hopsin got his start on a TV show like that, but my dude can rhyme. Personally, I don't care where you get you start from. Bring some skills and creativity with your wordplay on the mic. Vinnie Paz, Celph Titled, Lord Finesse, Rakim, Kane, Apathy, and a whole slew of others make a list like that for me. The Drakes, Wayne's and TI's of this world do not.