I tend to agree. Some prescribe to the belief that the cost of calipers is low enough to justify replacing them each brake job as a preventive measure; I don't. To me, the failure rate of calipers is far too low to justify the cost and additional labor. Fix what's broke.
Inspect the brake fluid and consider a full flush.
Inspect the pads for uneven wear that may indicate uneven caliper movement. Often this is caused by the pins being dry or having rust on them. Inspect, clean and lube as part of the pad replacement.