Any function devoid of "creativity" is. No choices equal no creativity.

As a note the same applies to logos. Very simple logos that are only some lines and shapes, do not have copyright (in usa)

Logos can still have trademark without having copyright as creativity is not a requirement of trademarks.

True, but trademark and copyright are pretty different on a fundamental level both in the purpose behind the law and how its implemented. I suspect if it weren't for the term "intellectual property" tying trademark, copyright and patents together, we wouldn't really think of them in such a unified way since they are all really different from each other.