Well, I'd rather have my pole flex versus snap. I've posted before about my CF pole snapping this year under an unexpected heavy snow. Luckily I could put the tent back up with my trekking poles and I was even able to find a "branch" on the North Slope of Alaska (there are no trees up there for those keeping score) that was long enough to work as well.
I guess my point is that I'd never go into a situation with only one option for erecting your shelter. After all, it is your Shelter If you plan to cut a pole, at least have trekking poles that you can use in a pinch. Maybe you get in super late at night or get caught in a surprise storm. Being able to put up the shelter quickly will be important. If you have the time, you can seek out a nice limb to serve as a pole as you set up a "true camp".
I guess my point is that I'd never go into a situation with only one option for erecting your shelter. After all, it is your Shelter If you plan to cut a pole, at least have trekking poles that you can use in a pinch. Maybe you get in super late at night or get caught in a surprise storm. Being able to put up the shelter quickly will be important. If you have the time, you can seek out a nice limb to serve as a pole as you set up a "true camp".