...and I've not seen an electrician yet who has a set of taps as well as number drills on his belt...
Look no further. I always carry a Klein triple tap (actually six different taps). I usually run the proper size through all tapped holes to clean them up. Beats cranking a screw in with a screwdriver that doesn't want to go because the hole is tapped undersize or damaged.
Keep the proper size tap drill bit in your drill case and you are all set.
I do agree with you otherwise.
-Hal