Earlier quoted context omitted.
>Early humans didn't have poetry. [Citation Needed]
OK so speech has begun 100,000 years ago (perhaps earlier). My point stands: Would humans without poetry not be considered intelligent? Hardly.
In other words, writing great poetry is a sign of intelligence, but not a requirement for intelligence.
Conversely, being good at problem solving, tool use, and planning might also be signs of intelligence, but maybe not requirements for intelligence either.