Part of the problem with tire life is riding habits and road surface. I always get over 10,000 now because of my job. I ride 114 miles every day at the same time, usually, close to the limit, all but 4 miles is slab. Less than 5% is twisty, fun riding anymore.
Others ride on 2 lane twisties that are covered with chip-seal, constantly accelerating, decelerating one turning, all of which are hard on tires.
Look at any racing car, from Indy to NASCAR they get less than 200 miles on a tire, Those same tires on a regular car would last thousands of miles.