In the hosp setting, we have safety first, and it s really worthwhile,; sometimes, it seems redundant, but when you have your fellow worker, co sign for high risks meds, and they find an error, you sigh with relief, that you had that best practise, in place. People are human, and working 12 hour shifts, mental fatigue, can cloud judgements, and people not intentionally are vulnerable to human error. Safety first, can save your life, and your comrades.