With bamboo, and cane, you have layers of fibers running in straight lines, as opposed to grains, running sometimes in somewhat straight lines, and with the bamboo and cane, there isn't any running off of the fibers as is the case at times with wood shafts. Some people love Sitka spruce, and say they are very tough, and flexible also. I have broken commercial "Cedar shafts" but I don't know of any one who have broken a cane, or bamboo shaft, in normal shooting, such as target, or hunting, and not hitting trees, rocks etc, even then, some people have reported hitting rocks, and only the point broke, but the shaft was undamaged. That doesn't happen very often with wood shafts of any type. But if you don't have access to bamboo, or cane, you use what you have. But if you want bamboo, talk to Mullet, and he can give you the address, and details on how to get a bundle of five hundred bamboo shafts for arrows. That will set you up in a nice supply of material, for making arrows for quite some time.
Wayne