Right, but it's not as though experienced players frequently ding their wood shafts. But when it does happen, it's quick, easy, and painless to completely remove those dings from wood shafts, nondestructively returning the shaft to pristine condition. Such damage cannot be completely avoided with CF shafts, and when it inevitably happens, the repair process, assuming the shaft is not damaged beyond repair, is much more complicated. Many players won't even be able to DIY the repair, let alone complete the repair before the next day's session (or sooner). In a pinch, a wood shaft ding can even be properly removed during a playing session if a spare shaft can be used for a few racks.
With respect to maintenance, when choosing between wood or CF shafts, people choose between occasional simple and easy repairs with wood, or even less frequent, albeit more complicated and expensive, repairs with CF.
You can take a ding out of a wood shaft in about 60 seconds.
If it's a really brutal ding, 3 minutes.
Lou Figueroa