Why a bow-heavy ship can dig into waves

Would loading a battlecruiser's bow more heavily improve its behavior at high speed?

Not necessarily; a heavy bow can dig into waves and take water aboard, while a lighter bow rises more readily.

Loading the bow more heavily is questioned because it can make the front of a ship dig into waves. Water coming aboard then pushes it farther down. A slightly lighter bow is proposed to help it rise and pass across the water. Footage of an Arleigh Burke in rough weather provides the example of a bow repeatedly going under.