Well, you can still use only the “white balance” module, and disable color calibration (that’s what we did for years before “color calibration” came along).
But if you use “color calibration”, you have to use “white balance” as well: some modules between those two (in pixel pipe order) need to get input that’s at least approximately white balanced (e.g. “demosaic”)*. And to make sure “color calibration” has a reliable starting point, you should set “white balance” to either ‘camera reference’ or ‘as shot to reference’. The full reasoning is explained in the thread introducing “color calibration”
I suppose you mean to leave “white balance” alone (but enabled)? Color balance is not a module for white balancing at all, but its use is recommended when using filmic to increase chroma/saturation to taste. Sigmoid and AgX seem to rely less on color balance for color grading (I rarely use those tone mappers).