Maybe it’s all the cruise ships displacing water, or people swimming in the oceans, or more whales, etc.
For the folks from Rio Linda....\s
Look, this is easy. More people drinking the water equals less water in the oceans. The oceans level goes down But more people with more water equals more weight on the land. So this additional weight pushes down on the land which is floating on the oceans and displaces more water so the ocean level rises. Net effect is no gain or loss. /S