Perfect Design?

I was trying to make sense of the claim that human are 'perfect' or 'perfectly designed'. I can't help it but to think that that claim is a mere conjecture. However, there could be 'perfectness' in the design somehow.

One problem with the claim is that there is no explanation on why human mind have so much things that it does not know. And often the basis of a knowledge which is needed to further understand other knowledge remain unknown until one mind get in contact with the knowledge. All knowledge will definitely not known to human mind unless somewhere or somehow human min get in contact with that knowledge. I can't understand why that basis of knowledge was not there from the beginning. For example, the knowledge about metal. If the knowledge about metal or metallurgy exist in human mind as per the design of human, surely human will use metal in everything. But finds in archeology tell us that prehistoric human uses stone tools. Why stone tools? why not metal? Metal was only used probably only in the last 6000 years. It can't be of any sense if perfect human is lacking the knowledge to exploit nature to their benefit right from the start. It is truly a sign of an imperfect design of human.

Anyhow, when I think of it in another angle, maybe the 'perfectness' that is referred to is of different nature. Probably something intangible. The ability to think. Regardless of whatever primitive human was at the beginning, one thing that human never missed and have in common is the ability to do art. Art has been there probably since the dawn of humanity. The ability to do art and other displays of creativity shows that human mind evolve. The brain was perfectly designed to acquire, perceive, visualize, observe and create knowledge. Is human hands perfectly designed? No way. That is why we have two of them. If one is perfect, we should have just one hand. That is the perfectness of the design. Human just have enough to do everything they want.

Well, still I don't think that human is designed by some designer. There is nothing special about human. Human are part of a family or kingdom, in which animals are human's cousin but not brother. Human and any other living being, complex or single cell are all the same in some sense. In reproduction, in need, in security, etc. we are similar.

Human are Hitler in that kingdom. Killing their cousins. Cannibalizing their cousin. Taking advantage of their cousin. What is the meaning of 'perfect' if human are like that? Mother Earth, who was protected solely by human's cousin is constantly being destroyed by human. Not only that, even the protector are destined to be gone one day. Is that the 'perfectness' that some people boast about?

Truly one view is so easy to be blinded. Just tell 'em that he is or she is perfect and have dominion over everything on earth. Surely he or she will be so proud to have destroyed his or her own house. So much of being perfect.