Ive seen this with many tires and many riders... IMOP, it sometimes boils down to two things, air pressure and the type of ridder someone is with the brakes. This is more obvious with "knob-type" tires. If you find you are easy on the brakes and keep a close eye on pressure I dont tend to see any issues. The folks that I do see issues with are ones that are (either or both) hard on the brakes and or wrong tire pressure...
For instance, Ill use myself... If I run a knob tire and I want it to last to reach a BDR, Im intentionally keeping the speeds "lower" and trying my best not to brake hard if at all possible. I currently have a MOTOZ ADV that looks virtually new and ready to go with 4000+ miles on them.... On the other hand Ive seen many You-Tube videos where other guys have the exact same tire and it's totally trash, cupped, and destroyed in 1500 miles and they are not happy and complaining about the same tire. In some videos the guy says he has been ridding hard on it (but it's absolutely destroyed) with the same tire I have with 4000+ miles and virtually looks new.
Point being, we all ride different. Not a 'right or wrong' situation. But how we ride our bike has a HUGE difference on how tires will perform and last. Im NOT pointing fingers, it's just an exercise on (everyone) having the right tire for how and where you ride, and then specifically HOW you ride the bike.
If I was handed a set of tires and told to ruin them as fast as possible, I could probably cook virtually any set in less than a 1000 miles. With hard acceleration, diving deep and fast into turns, and hard braking. It would be fun, but the tires would be dead....... No one rides the exact same, we all will end up with a different conclusion.
Stick on a new set of tires that only you have ridden, be safe, but make mental note on how you brake, and how much front versus rear.... and always keep an eye on the pressure within a few pounds... I think you will probably answer all your own questions. If you're currently in more of a road tire and you find this type of wear, be mindful that with knob type tires it can become much more of an issue much faster (wear, cupping, funky knob wear, strange wear leads to much more vibration, Etc). The knobs are excellent for dirt, but if anyone wants them to last worth a Hoot, folks have to chill the hell out on the normal pavement roads. Otherwise the knobs will wear quickly and you then might be disappointed. Knobs also dont like high speed. I didn't say they might not be rated "safe", and I didnt say they could not go fast... If you want them to last, SLOW DOWN. High speed gets the tires hot and then just cooks the knobs right off, just going down the highway fast. I have friends that still do 75-90 with knob type tires and they get way less miles than I do because I probably do 60-70. Currently my MOTOZ ADV tires at this pace could probably get 8K total on the rear, and probably 9-10K out off the front. I religiously baby them on the tarmac and ride hard off road.
Of course this is just personal thoughts and experience..... everyone has their own ideas.........