For those who race CF bikes I don't think they would want all of the exposure to elements, extra miles, and of course theft. CF is not the longest lasting material on the market and they do wear out. If you are just a commuter or rec rider you probably don't exactly tax the bike very much so riding it should not wear it out. Unless you live in Mayberry RFD, you better keep it inside somewhere. If your workplace does not allow bikes inside, look around the neighborhood for a business that might let you rent some space in a back room or something. One bike just does not take up very much space.

And hey...if you can afford CF bikes like Kleenex, you should always ride what you like.