You are a newbie to pool and/or aiming discussions but you are not a newbie to life and common sense. I've dealt with people in various situations that I was not expert in, like foam insulation or walkway pavers, etc. When your knowledge level is low everybody in that business looks like an expert, unless of course there is something outright fishy about them, but they're not always experts or even that good. Use your common sense when it comes to pool. You already have it right that the set up and delivery of the cue is the whole enchilada.
Think of it this way: Let's say you had a cue that could be set down on the table as if you were holding it, and all you had to do was aim the cue at the cb/ob to pocket the ball. Only, you don't touch the cue. You say "Shoot"! and the cue automatically shoots the ball with perfect mechanics. If you kept setting up the cue for every new shot and got down in aiming position to line it up I'd say you'd have aiming mastered in a week or so, if that (not including using english). The point is that you don't know what you don't know. You are on the right track with fixing your fundamentals. You most likely already know how to aim much more than you think you do. Given that, and that you probably don't have 10 hours a day to devote to pool, spend your time on what gives you the biggest bang for the buck. Fix your fundamentals and by the time it comes to worrying about how to aim you might find that you already know how to do it.