They might break today, they might break 5 years from now, you never know. It's just the nature of carbon fiber. Just use them, treat them well, don't get them nicked, and don't worry about it.If you apply enough pressure from the side they will break. The alternative is aluminum and it bends, so pick your poison.(Never broke my carbon or fiberglass sticks, but I haven't used them in years.)
Then they won't break.. But mine broke because they got stuck in my wheel..
don't get them nicked