To each his own when it comes to anything fishing.
Sonar is my depth illustrator so I know how deep to run a lure; it shows the type of bottom (i.e. weeds, rocks, flat vs hump or steep drop); and whether any fish are in the area - even bait fish. I never catch fish beneath the transducer and don't try seeing as how I rarely fish in water over 8'.

A fishing buddy could almost keep up with me catching fish on a red/chartreuse Crappie Magnet and nothing else. But the challenge for me is finding the many lure types, shapes and colors fish are compelled to strike. When fish almost hook themselves on certain lures, I get the same feeling I did when I caught fish for the first time as a kid on live bait under a float. But float fishing doesn't cover water fast enough for me in the search for fish locations. Last week I wasted 3 hours until I found parts of the lake fish were concentrated in and then my numbers careened to over 50.

So when it comes to information regarding anything fishing, our preferences dictate the questions we would like answered or when trying something different expands our knowledge base. Above all, fishing is about s-a-t-i-s-f-a-c-t-i-o-n - the kind you get that involves the outdoors, fresh air, weather, water and most important - feeing blessed when fish strike!