If you read what I said carefully I never once said "it was there OWN fault" - I said that they inherited a rebellious nature which led them to sin which in turn leads to suffering and eventually death for us all.
Now if that were the end of the story then
Basil Fawlty was correct!
However he isn't, as the Manufacterer actually intervened* to launch His Mission to save misereble ungrateful slime like you and me, which is why we started sung carols and eat mince pies
* We are also free to ignore this intervention and enjoy Christmas once a year and give no thought to it whatsoever.