Tire imbalances are mostly influenced by how much load is on it as well. Chevron cutting (no chunking) doesn't have nearly the effect as flat spotting on static balance.
If a rotating imbalance 1 ounce at 15 inches and causes a 300 pound upload (at some speed) on one tire on a main bogie, you won't even feel it upstairs. While the same imbalance on a car tire would make you think your car was about to fly apart
Each tire may have a load of 50,000 lbs or more, but the imbalance although seeming massive (300 pounds upwards, or a lot more!), is a very small percentage of the total load on the tire (.6%). On your car, with each tire holding a 1000 lb load, that imbalance is 30% of the load. Tire mass has a bit of influence, as do other tires on the same bogie, but it's mostly (imbalance/load)*100%
It should be easy to understand why nosewheel balance is so much more important, but I won't go into that (you generally won't see chevron cutting or flatspotting on nosewheels anyway).
It's not good for a tire to be unbalanced, but landings, takeoffs, and taxiing aren't good for them either.