I believe that the real intention behind the statement is that not all users of their product are going to have 5 working fingers if they've had some sort of accident or similar.
That line of thinking doesn't get you far with anything. Nothing is universal. You can always find someone with some disability that prevents them from using a product.
Accommidating as many people as possible is good, but you can never accommidate everyone. Same goes for all of these "things programmers believe about X", be it names or whatever. You absolutely need to provide working product for majority of people first and majority of people have at least two names or in this case 5 fingers.
Accommidating as many people as possible is good, but you can never accommidate everyone. Same goes for all of these "things programmers believe about X", be it names or whatever. You absolutely need to provide working product for majority of people first and majority of people have at least two names or in this case 5 fingers.