Score smore. They put flags in the cups for a reason... to have something to aim at. If you not living on the edge you're taking up too much space.
We're talking about internet golf advice, right?
Eh no.
There is a simple point here: figuring out what to do is relatively easy. Doing it is hard.
Sure, there'll be four or five shots a round where you will have to make a call between two or three options.
The stats say by and large, you should go for the more aggressive play, though I think when there are full shot penalties in play (including e.g. pot bunkers), you should think twice.
But people who make out 'course management' is really tough or that there is some secret to it are the same people who complain about slow play.
I do agree that as you gain experience, you should try to learn about your own game and play smarter.
EDIT: I always walk - plenty of time to think!