What cameras are we talking about? And photo vs. video?
Maybe someone else can explain the scenarios and kinds of magic a physical filter is expected to do in terms of optical physics. They definitely cannot add back photons or information that is missing.
Particularly for deeper diving, most of the photons available are blue, and for a cheaper camera these are useful for resolving detail in these low light conditions. I wouldn't want to block them, but instead apply digital white balance correction on-board or in post processing. Meanwhile a high dynamic range camera can get detail in all channels even in low light and still does not blow out the blues, even without filters.
I'm pretty sure that for many cameras that collect in RAW format filters are not a requirement, since the color channels are independently recorded and can be mixed in post processing to achieve white balancing.
But we still need to be careful about choosing camera settings that reasonably cover the dynamic range of all three desired color channels, as cheaper cameras with smaller dynamic ranges could blow out one channel while underexposing another. An extreme example is the role of the yellow filters for fluoro photo/videography.
Even the OM System TG series does raw, though in practice it is more convenient to instead use the one-touch/custom white balance capture functions to calibrate the camera's JPG profile to render colors accurately at whatever depths and water colors we encounter. So I haven't seen a need for filters.
GoPros seem trickier, but newer ones have settings and modes (log, 10-bit) that also should alleviate the necessity of filters, for those interested in the digital methods
