1.) Easy to remove/repair inserts, using good adhesives like ferriletite
2.) Easy for anyone to cut and get square ends without 8billion RPM motor
3.) Fletching alums is a breeze with most glues.
4.) Almost always straighter/more consistent spines
5.) nice and heavier generally than carbons.
6.) just plain gets the job done, if you coudln't get it done with alums, then carbons are not going to help you.

1.) Carbons are hard to repair inserts
2.) Easy to cut and square ends. No harder than aluminum's
3.) Fletching is fast and easy with a super glue and they stay on. I have a lot more problems with aluminum's and glues.
5,) Carbons stay straight don't bend and get soft on the ends and bend after shooting into a target time after time from the heat are from hitting some thing hard.
6.) Carbons are lighter but, do not oscillate like aluminum's, so more energy out of the bow and retains more energy to the point when it hits some thing. Smaller around for better penetration and blow through game almost all the time and with out braking off in the animal most of the time. I seen aluminum's brake on impact before if the animal moves on impact it snaps off.
6,) You can get the job done with aluminum, wood are fiber glass arrows. Carbon just last longer, the penetration is great, shoots faster and flatter not as many bad hits because of being a couple yards off.