The protective cover seems unnecessary on the day it has nothing to stop.

Prevention gets judged on quiet days, which is the worst possible test. Anything that works produces no event, so its evidence is an absence, and absences are easy to mistake for waste. That is how guards get removed, cover gets cancelled, and checks get dropped, usually shortly before they were needed. The thing that never happened is still an outcome.

Before dropping a precaution because nothing has gone wrong, ask what it would cost on the day it mattered. Keep the cheap ones simply because you cannot tell which day that is.