In the season's first practice, the great UCLA basketball coach John Wooden would teach all of his players, even seniors who had won multiple national championships, the proper way to put on socks and lace up sneakers. Why? To prevent blisters ... that might cause the players to run down the court off-balance, which could then cause knee problems, then back problems.
I trot this anecdote out when I'm explaining something that my students might find too obvious. Nothing is too obvious when it comes to composing prose. You have to take care of everything.