Why "the five"? It's for the adjusting and setting of a bone, katartismós. Do we all need that at times? Of course. Go to biblehub, choose interlinear, and you can look up words in the original languages of the bible. This doesn't make us theologians - knowing Hebrew, Aramaic, Greek, the history and grammar of these words/languages, etc. - but it's a helpful tool still. There's lots of great teaching out there on the fivefold. Welton is brilliant when it comes to defining the actual role and functions of the fivefold, not just general descriptions. Below is another great example of wonderful teaching on the fivefold, by evangelist Daniel Kolenda.
For more free content on the fivefold, visit Welton's youtube channel.
Patricia King and Jonathan Welton on the need for the fivefold.