Let's say there is some weird service that you sometimes need to manually restart in a very specific order for maintenance. The hard (time intensive) task is figuring out the right incantations and the order to do it. It is however not time intesive at all to store those incantations in a shell script.
So not saving that in a script risks you (or a co-worker) having to go through this again, potentially missing some important aspect and wasting time and energy.