Mostly root canals pose an ugly business; in addition to the pain that comes before, you have shots in the gums, drilling, nasty smells, your mouth hanging open for the world to see. Your shirt might get wrecked from a chemical spill. You miss work, have a mouth that's numb for a day, aching for a day or two, and a tooth that now will probably begin to turn brittle. At least it stops hurting.
On the other hand, you may have a spouse that sees your situation as a good reason to make homemade tomato soup so you don't have to chew!