Good questions. It's hard because none of us have the time we need to teach everything we want to teach and to make sure the girls get the reps they need. If you talk to most college coaches, they will say the games are for the kids and practices are for coaches. No argument there, but how does a high school or travel coach ever have the time to coach some of these game situations if you don't do some in-game coaching?
If you can't coach during the game and you can't correct after mistakes (because that's NEGATIVE! and we certainly can't have that), and you can't have 15-minute chalk talks during practice because it's boring and girls aren't getting their reps, what is a coach supposed to do? You also can't correct in the postgame because it's seen as pointing out individuals and is negative.
That is a bit of an exaggeration, but not by much. Our culture is so soft right now that it makes the job of a coach - especially volunteer coaches - extremely difficult. Teach my kid everything, but don't ever tell her she did something wrong.