shilsen said:
I fail to see the problem
Joking aside, I think the problem is that it can easily seem metagamey.
It is an artifact of the game mechanics that a solid hit on an opponent's weapon or two can be so much more effective than simply hitting the opponent outright.
It is also an artifact of the system that by the time I notice my opponent is going for my prized weapon, it is most likely too late to do anything about at all. In fact, the only countertactic to a sundering opponent is to swap weapons -- which is not really a countertactic so much as conceding defeat on the issue.
Taking this sundering idea to the logical extreme, mooks should not attack PCs for damage at all. Their best hope of defeating the PCs is to attack their
stuff and only their stuff. I would note that even arrows are pretty good at damaging cloaks, belts, boots, and other soft goods that are likely to be magical. Destroy the belt and the Bag of Holding with all those lovely scrolls and potions falls to the ground. Compare the AC of the PC's stuff and the typical AC of the PC.
These tactics would be valid and effective means to game the system, but it would not be fun. And I believe it was Nigel of Spinal Tap who said: "It is such a fine line between clever and ...and...stupid."