Bad People et. al. benefit from that silly incompetence.
Result they blunder about at will.
What they need to do is not plug it from the top, the pressures at 5000 ft under water make that tedious and near impossible for mortal man to do. What is needed is to implode the rupture from below... A few hundred pounds of Semtex shoved down the pipe to a few hundred feet below would accomplish this nicely... By imploding the opening from beneath, it would keep any further oil from leaking out...