Like you, I'm suspicious of celebrity politicians. But I think their election generally points more towards systemic problems in how we elect people (money talks) more than celebrity per se as a flaw in a politician.
I have to disagree with Black n Red on the career politician thing. For one, it spells experience. Two, throwing the bums out gets us what if we haven't changed the way we elect people beholden to corporate and other special interests? A new bum.