Oh - there's one other problem with CF bikes: strength in CF is directional so stresses have to be planned for. A CF crit bike will probably resist a head-on impact better than an alu one, but it will more easily damage by a minor impact from above to the top tube or chainstays. This problem gets worse in more expensive bikes because they put very high modulus but brittle CF there (there are four or 5 different categories of CF in regular use, and high end bikes use 3 or 4 in their frames.) Unlikely to happen and nothing that should stop anyone from racing one, but again, more complex than "spare wheel" (whose profile name pre-ad homs him, although he doesn't use the word correctly) and the like think.
Again, CF is an excellent material for performance bikes but knowledge is your friend (although other people's stupidity can be a rich source of amusement.)