If pouring rain or wind force you off a school of biting walleyes for example, raingear becomes a critical tool. Rods, reels, line, lures, terminal tackle and various live bait are more obvious examples of fish catching tools. These must all be tailored to a specific kind of fish and their location in terms of depth, cover and structure. Good gear means nothing if you don't know when, where and how to use it properly. There may be dozens of ways a particular tool can be utilized.
Good fishermen learn all the presentation tricks.
Each one requires a very specific method in order to be effective. The same is true of casting. Variations of these must be fine-tuned in terms of speed and depth according to the lure type being used. Technique separates skill from blind luck. Success is achieved by continually asking questions while experimenting.