Extracting common features is not easy (that's why most people cannot do it)

not hard. very easy actually. anyone can do it.

People learn from each other, mostly by looking up to other people. But you need to make a distinction between imitation and inspiration.

both go hand in hand

Which proves you wrong.

You just told me "this is a can of coke therefore potato"

no it doesn't prove me wrong. It proves you incoherent though.