Skill is not so much planning your next move as it is predicting your opponents.

That's not fully true,

Decision making skills is more about planning your next move to gain advantages only rarely to predict.

Mechanical skill is about knowing your champ's kit and prediction only rarely planning.

So since there's 2 different sets of skill you're half right :D

If I land this binding on the enemy tank (under their own tower) for harass, what are the odds my team will blindly dive onto them and die? Throws Dark Binding ... Well, damn. Boosted Morgana, focusing the tank.
Reported.

Unless you're going for a no counterplay oneshot combo.