I would like to question the original analogy, which compares a person to a watch.
I have multiple problems with this. Firstly, a watch is perfect for the function it is designed for. A well-made watch is functional, stylish, and is a status symbol. Agreed, a watch may need repair. But for a good watch, this is quite seldom. It achieves all of the aims of the designer.
People are far from perfect. We suffer from numerous diseases. Many people suffer from birth defects that last a lifetime. Others are born with vestigal limbs (limbs which come from an ancient ancestory). Some people are born with tails, for example. We have glands that do not have any noticeable function. We age, we die. There are many ways we could be designed better.
Secondly, the watch is designed for a specific purpose. It tells us the time, and it is easy to transport around. The rest of the stuff about the watch, such as the style, is incidental.
What purpose is a human designed for? I know that this will go off the track, but I still need to ask. A watch has a purpose, quite obvious from looking. It tells the time. What purpose does a person have? To kill animals? To fill the air with polution? To kill the environment? I cannot tell from looking, no matter how detailed a seach I do. I could do a better job of all of that with an incinerator.
I dismiss the argument that compares a person with a watch on the basis of how a watch works and is designed, and the purpose it serves, and how people don't work, how poorly they were designed, and how we do not have a purpose.