I balance my MT's once.
Most of the out of balance complaints online, are from people unused to the MT rumble at low speeds. They naturally went back to the tire shop and forced them to make it worse.
Also people that don't rotate enough. Get a rough wear pattern. They rebalance, and that wear screws with the machine, and boom, ya'll made it worse.
Beads work. But having to constantly explain what's going on to a tire tire tech, or moronic service writer every single time I need tire work done......is too tiresome. (These jabronies don't even know what a plug-patch is)
Metal beads and a gallon of Green Slime was our go to for a long time. Now I only run air.