To be fair, this is all extremely cynical while we don't actually know what happened.
This may absolutely make a great tale about hubris one day, if we ever find out.
This feels more like someone went skydiving with a homemade parachute in strong winds above an active volcano.
In this case, OceanGate has a well documented history of making poor and reckless engineering decisions. The fact that things went horribly wrong is probably related to one of the many corners they cut.
It will be interesting if/when we get more solid information but until then most of the speculation seems pretty on point to me.