I recall one episode of Time Commanders
http://en.wikipedia.org/wiki/Time_Commanders
in which one of the team leaders fell foul of "a little knowledge is a dangerous thing" and stuck rigidly with having a couple of his units hold onto a hilltop position, because "holding the high ground" was, supposedly, vital. They lost the battle because all the units which couldn't fit on the (small) hill were systematicalły mashed up by their opponent's forces, working en bloc, at such a distance that the forces on the hill could neither make their missile weapons reach*, nor run to assist without "losing" the high ground, to which they were so attached.
"Rules" are something of a security blanket for those who are unable to think outside the tram-tracks.
* The simulation was set in the Roman time period so the missile troops used everything from throwing spears to thrown stones, slingshot or, where historically correct, archers. Ballistic formulae dictate you get extra range from an elevated position but that is all. In this specific battle they were only skirmishers using a hand-thrown weapon which is only accurate from close quarters so the hill did not help bring any enemy units into range.