Really? I've shot Axis arrow for about 8 years now I guess and I've never had a single issue with a HiT insert. I don't think I've ever had a BH not spin true when using them. Never had one pull out or drive deeper and they're a breeze to put in. I wonder what people don't like about them. I guess the only negative I can see is guys that shoot mechanical heads and the blades slap back hard enough to cut the adapter ring and split the end of the shaft. The first year bowhunting I shot scorpion XPs and had that happen twice. I think that's more of a failure with the BH ring than the shaft as I've never had that problem with slick tricks.
I don't think I've ever bent a carbon either. I've seen guys bend the FMJ shafts that are carbon over aluminum but all of my straight carbon Axis shafts spin true. And trust me I give them he'll. Ask any of the guys that's shot 3d with us and they'll tell ya, we rarely shoot from the stakes and skipping them off trees is a common occurrence. Lol. Just flex them real good 360 degrees and back in the quiver they go.
The last experience I had with aluminum was with Game Getter II years and years ago. But I remember that if you nicked one and flexed it to check, it would bust in half pretty easy. So will Carbon if it's compromised but I remember aluminum doing the same. I do remember the aluminum wasn't nearly as forgiving with slapping shafts or stacking them in there, seemed like bent, nicked, and flat spots were common.