why not? what do you think about the eye design for instance?
The human eye?
If done on purpose, it is very poorly designed indeed.
If we draw an analogy to a Sony camera for example, it would mean that the sony camera had all the wires concentrated on a point IN FRONT of the lens wich would result in the equivalent of the "blind spot". The camera then would require
additional software to "fill in the blanks" based on the stuff "seen" surrounding the blind spot. This results in an unecessary extra battery drain as such "rectification" requires additional energy. That's
very poor design.
The design itself is ugly: wiring in front of the photoreceptors
The design is inefficient: it requires additional energy to compensate for backwards design
It's exactly what happens in the human eye. The wiring is essentially backwards. The nerves need to cross the retina which creates a blind spot. Our brain then needs to do additional "computation" to fill in the blanks to create the delusion of not having a blind spot. Otherwise, we would consistently see a black spot in our field of view.
But make no mistake, it's still there. You can test it for yourself by holding up a pencil
inside your field of view, but on the exact spot that makes the image reflect on the blind spot.
As you move accross that point, the object will "disappear" from your field of view and re-appear again once it is crossed.
In an evolutionary context, this makes sense... Evolution can not go "back to the drawing board" and rectify "historical mistakes". Way back in our lineage, our eyes initially happened to evolve "backwards" (a backwards eye is still better then no eye). So evolution is stuck with that "bad" initial design. The only thing it can do from that point forward is "tinker" with it to make it more efficient. So additional mechanisms to "rectify" the image are expected.
An octopus, for example, doesn't have this problem.