[asphaltgambler]

Devils advoctate. I'm a tech and I would make the same recomendation. Most calipers are only available as a set of two and there is a good reason for that

The issue is that the other caliper could have the beginings of the same sticking. You could machine the rotors, but at that mileage the chance for heat warpage is greater because now the rotor is that much thinner which would lead to pulsation.

I would have also had the brake hyd system flushed as well. The problem may be that the other caliper would start sticking. I also would clean and adjust the rear drum brakes as the auto adjusters rarely work as they are supposed to, leaving additional work for the front brakes

Think of the repair this way. ...would you only replace one shock absorber if it was leaking fluid at that mileage? They are correct in the context of fixing the actual problem then replacing the other components as preventative maintenance.