When I first got serious about angling instead of just fishing I used to ask reasonably reliable fisherman I was friends with about different lures, presentations, etc. And I would ask are crank baits good? What about lipless? Do Zara Spooks really work? Backs of coves or do I really need to learn how to fish main lake stuff? Chatterbaits work? Should I use a trailer?
The answer I got most of the time, and that I got sick of hearing, was "oh yeah, they'll kill that..... if that's what they're biting...." or "Oh sure, you can catch a ton of fish back in a cove when the conditions are right....."
Which led to me to ask them well, what conditions, where and when?... Which led to seasons, forage, structure, water temp, clarity, depth, bottom hardness. The list of factors that affect fish is pretty lengthy and what will come into play when depends very much on the lake and the fish in that lake. No two lakes are the same. No two days are the same. No morning on a lake is going to be exactly the same as the afternoon on most lakes. You can troll through two coves and think wow, these look great and fish them with 3 different lures and get nothing then hit on a third one and catch good fish on the first thing you throw.
Fish are generally not reliable creatures when you get right down to it. They are finicky. They turn on and turn off in a minute. Sit in a cove with schools of fish all over and it will be calm for an hour, then all of a sudden it's like someone threw a light switch and every school is getting blasted by bass feeding on them. You throw the kitchen sink at the attacking bass and they totally ignore your offering but keeping marauding the schools. Then it stops and you wonder why they didn't hit your lure in the midst of that feeding frenzy and where did they all come from and where did they all go?
You'll see a lot of pros and amateurs alike say cover water. KVD, the all time great, says in practice for major tournaments if he tries something for ten minutes and doesn't get a bite during practice, he's either changing lures or moving to another location to try something new to find the fish. He doesn't waste time looking at his electronics and the available visible cues thinking "Man, but this spot looks good, they gotta be here!" He either gets a bite and takes it from there to determine how good that spot is for bigger fish, or he moves on.
The question is not whether or not a spot looks like it should hold fish, therefore you must find and catch the fish that are there. It is a matter of fishing a spot awhile and you either get a bite or you don't and you keep moving. I used to fish stuff endlessly thinking "this cove, these laydowns, the shade along here, man, there just has to be fish here!" and there could very well be. And I would spend 2-3 hours of my fishing day working the crap out of that area fishing everything I could think of for fish that weren't feeding when I was there.
Now I don't do that. I troll miles of shoreline, and if I get bit in a stretch, I might double back on that 100 yards or whatever and use a different lure. Or if its near a lay down, I might stop and work that for a bit and see if I can pull some good fish out. But I certainly cover 200% more water than I ever did when I started. Now I get it.
If I want to catch, and not just fish, I am going to cover a lot of water and see a lot of "good" spots and maybe catch some fish in some of those spots. But it won't be every single one, and I will be able to narrow down where the fish generally are and what they are biting that day to refine and improve my targeting as the day goes on. Like "everything I have caught so far has been a this square bill crankbait on points in about the 6-10 foot range depth wise" so guess what I am looking for? Points, and I will be using that square bill in the 6-10 foot range first. And I might spend the rest of my day hitting points and targeting that depth range and using the same retrieve if it consistently gets bites.
Of course to each his own, but I am still going fishing to catch fish, not to target bigger ones specifically. Maybe someday I will make that my goal and refine what I do. But my goal is to catch as many fish as I can with what time I have available, not necessarily big ones, so this is what I do. And I have a lot of fun and do bag some decent ones, some days more than others.
Good luck. You're hooked on a sport now that's worse than crack and more expensive...