This (if true) would support the theory that a “superior” (subjective) or precedant human population developed greater intelligence before homo sapiens sapiens, which is a very very radical one because, they either went extinct 250,000 years ago (like many other pre-humans and other parallel branches) or they left earth or at least the surface of the earth.
Sorry for all the parenthesis
They were balanced. You are good to go.
intelligence is only one critical characteristic among many for survival and longevity