You think evaluating and grading comics day in and day out is mind numbing, I did visual electronic defect inspection on Texas Instruments DLP chips for 3 years. The final stage before microscope visual inspection and shipping to the OEMs. The job was literally standing in a 10' x 10' black room, projecting a series of patterns, fades and color spectrum tolerances for 12 hours a night. That was fun
We had to have our eye sight evaluated every 3-4 months to continue inspecting. But really as horrible as all that may sound, the job really wasn't so bad. Monotony sets on when you don't find defects. Because then you find yourself double and triple inspecting a single decide.
I guess my point is, yes it is good to have a background and decent knowledge base of publishers, their printing and assembly practices per era and such, but when it comes down to brass tacks, it's still a visual inspection and evaluation job. Anyone that has a history of doing fine inspections on anything, being able to spot the slightest defect is all that matters.