Right. On BF, you're largely going to get scoffed at for thinking about stuff like this. This forum is mainly populated by curmudgeons who don't care much for the finer aspects of cycling. This is despite the fact that many deep wheels come with counterweights stock and some pro teams balance their wheels too (don't quote me on that).
That being said, I haven't balanced my wheels, and don't really feel the need to. I very, very rarely go over 45mph and I don't feel unstable under that speed. Even at 50mph, I've never had anything close to speed wobble.