Some thoughts ..
(a) SOPs are for standard operation, sound jugdement might lead to a different conclusion for the situation at hand
As I was counselled at the debrief after a 727 check ride many years ago by a chap whom I held (and still hold) in high esteem (one Brian G) .. "John, my lad, the Ops Manual omits an important exhortation on the front page, viz, to be read with a modicum of commonsense " He might have been a tad briefer than that .. but the idea is much the same.
(b) Following the book is good airmanship 99% of the time.
.. a similar observation, I suggest ?