Titanic submersible es morte

There are cutters that use water at high pressures to cut through concrete, so it seems plausible that a fissure in the hull of a submersible deep into the ocean would create a stream with enough pressure to cut through flesh and bone.
Water jet cutting, according to the internet, is done at about 50,000-60,000 psi. If that's correct, it's significantly higher than the pressures at those depths. I'm not sure though if a pinhole would concentrate the pressure and make any difference.