Over time policy regarding the edits Janitors perform has changed. Currently the policy is much toward least intervention and, in particular, not editing node content for stylistic reasons. The group of editors is large enough.
I often consider nodes for "code tags" and related mark up issues without any expectation that the Janitors will add code tags (except in the case of Anonymous Monk posts). I do this as a heads up to other monks that there is a formatting problem with the node, but the OP has been informed and a reply to the OP's node to that effect is not required. This seems to be much too subtle for many monks to grasp however, sigh.
True laziness is hard work