even without credibility... I doubt very much that OceanGate has the liability insurance to cover the millions of dollars blown on the recovery effort. Not for a submarine that was never certified by a 3rd party, was never not-experimental (and was experimental to get around safety regulations...)
In fact, I would be very surprised that OceanGate had liability insurance, considering the risks involved. and that the only assurance the sub was in fact in good order is a giant "trust me, bro".