Everyone in this life makes mistakes/ stupid choices ( even though most people would have put life jackets on kids in the first place!) and everyone reflects upon their bad choices with advice/ suggestions and criticism to help them change their ways and realise their mistakes.
HOWEVER to then do the thing ( no life vest’s) that got you so much criticism and endangering their Kids lives etc the first time when you have got a second chance, what do you do ? Make the same choice/mistake again! There is no learning process involved for Sarah and Chris which just flabbergasts me!! Just plain STUPID there’s no other word for it!