"If you were to shave off all of the land from the tops of every continent and island in the world and fill up the ocean's deepest points with that land, then the entire earth would be covered with an ocean two miles deep."
This is a video from RealLifeLore detailing just how deep the ocean is. SPOILER: super deep. Like, deeper than the average flight altitude of a commercial plane (10,972-meters, ~36,000 feet, ~6.8-miles). Plus it's estimated only 5% of the ocean floor has been accurately mapped so there are probably even deeper spots. So yeah, the ocean is pretty deep. Maybe not quite as deep as me, but I taught philosophy in college. "You talked to the squirrels in the quad." Yeah, and now they all know philosophy, that's how deep I am.
Keep going for the video, it really was interesting.