No idea why poles are perhaps not stronger. I've done a lot of experimenting with wind and snow loads and center pole tents.
The stiffer aluminum poles 6061, 7075 break before much deflection, softer aluminum poles bend more and can sort of be bent back, but in reality are never the same strength as before. The stiffer aluminum poles, are often ruined as well, due to not fitting right.
Doubling a pole, does increase strength. In the case of mids or tipis you can duct tape them together to get a pretty stable pole. Duct tape is pretty strong at holding things, in fact myth busters hoisted a car with duct tape. The problem is initial adjustment is a PITA.
Most poles, in mid / tipi style structures see a lot more stress in the center, meaning a pole could be smaller / weaker at ends.
With Carbon fiber, getting about 4x the strength on an 8 ft pole is about 6 ounce weight penalty (50%). My guess is aluminum would be 12 ounces penalty.
Carbon fiber usually breaks just one section, near the center if all poles are equal, or of center to the weakest section if they are not. This has some advantages, if you have an extra section, the whole pole is not compromised as many aluminum poles are. So while the aluminum will still operate, sometimes, depending on how it failed, it's pretty much compromised. CF , replace a section and you are fine. In fact, in some cases, a section can just be duct taped and made functional.
I've tried making weak spots or protection measures in a pole to absorb stress. More problem that it was worth, but perhaps some really clever person could figure a system.