A GM can annotate a GM game and make all the good moves sound obvious... more importantly, I can read the annotations and really believe the moves are obvious.
That's sort of an illusion though... I think all reasonably experienced players can find good moves in nearly all positions. That's not what makes chess hard. What makes it hard is bad moves look good too.
So when you give some 1 line explanation like "development" or "attacking the center" that's not what's holding players back. They see those moves too. It's that they play bad moves and give the same rational (as a silly example, 1.Nh3 development). What experience and study does, is essentially blind you to those bad moves.
All this to say, Although the explanations make sense to you, I don't think they're necessarily useful to your target audience.
Recently, there's been a lot of talking about positional understanding (as well as openings), and how they're important.
Yeah, tactics flow from a superior position, but really, you only need a *basic* positional understanding, really just easy rules, and you'll easily get 98%+ in all of the ranking on online chess, and probably high class B - low class A OTB rating (at minimum) if you focus on tactical skills.
What you really need to do is listen carefully to those basic positional ideas, and stop breaking them by considering too many other less important things.
Maybe to become titled or advance further, you need more intricate, specific, positional skills (in fact, you probably do), but the level is estimated way too low for this to start being of any effect.
Here are 2 games I played in the petroff's defense, the boring variation (I like to play 4.Nxf7 or 5.Nc3), where I just followed basic principles, didn't do anything special, and won quickly. I can tell you easily the opponent's positional mistakes - actually, they were all very basic.
In fact, I didn't think anymore than I did in the annotations really - no time to think. I just made sure my moves were tactically safe, and tried to take advantage of opponent's tactics. I even made some pretty obvious mistakes (like missing Nxd5) yet by just playing basic positional principles, everything wasn't that hard.