According to my rural-raised coworker, that submersible implosion was apparently a conspiracy.
According to him, The people aboard the sub came up with a plan to escape their debt. There was nobody aboard the submarine, and it was designed to implode as a permanent diversion.
Maybe the just disappear like in witness protection and this dude didn't want to leave his son alone? It's too far fetched though. Given all the questionable things Oceangate did, independent verification of the implosion sound waves and finding the actual debris, it is extremely improbable it was staged.