It does perform as it should. Every iPhone Apple makes is different. Manufacturing has tolerances and parts fit together differently. It's just the way it is.
I understand your point but still it does not make sense to me. In my opinion it is a faulty device. I do not want to hear my device clicking/popping. It makes me mad. There is no reason to defend Apple. I have an iMac and an iPhone since 2010. I like Apple. But I will switch to another brand if they keep doing little annoying mistakes. That is why I want a perfect device.