I part own a coffee shop, but have no idea how to make the continental coffees on offer! Why? Well, I have no need to know and no interest in learning.
Your argument is just silly, as many high fliers are too busy creating wealth and employment to concern themselves with menial everyday tasks.
Incidentally, the reason his wife banned him from using cashpoints was that he stated the PIN number out loud once too often
PS Anyone know why we say PIN number, as the acronym stands for Personal Identification Number, we are, in fact saying "Personal Identification Number, Number"!!!