Correct. Reality for most of us, we will blow up the tires from age WELL before they are worn out.
BUT, if you do a lot of slow speed manuvering, backing turning etc, you will notice this sooner.
I did not notice this on with set of majority worn tires on my rv trailer. My equipment trailer which does not spend a lot of time on the freeway, one noticed the accentuated rear wear. When you literally jack knife the trailer half a dozen times in 40-50 miles of during, getting a bobcat, trackhoe or equal on and off if it daily, park it back at shop. This WILL be an issue. Did I notice this on tv tires? Yes after 50k miles vs 10-20 on equipment trailers.
You decision.
I also have never balanced a trailer tire, not dual wheels.
Personal choice on that on IMHO.
Marty