Lisp'n Here!

Is it just me or do a lot of tv personalities have very noticeable lisps and speech impediments. I just need to know two things. Number one, did they get hired becuase of their unique consonant expressions or in spite of them and, number two, do they even recognize or realize that they are not producing certain letters from the correct and agreed upon places on the tongue, teeth, and lips? Kevin Pereira is one of my favorite aural offenders. I really enjoy his presentation of gadget news and digi-globe cultural memes. I'm just not sure how much of his ths in place of s I can stand.

Have we reached a point where, certain things like perfect diction/pronunciation don't matter anymore? Maybe I'm being too harsh and people like Kevin are aware of their difference and simply aren't able to do anything about it. If that is the case, then I am truly sorry. If it's not, then I'd like someone to explain this whole thing to me. I used to have a horrible stutter, and it drove me mad to listen to it, so I worked hard to slow things down and get them out of my mouth right or not at all. Perhaps that's why I'm a little sensitive.