This is neither a message that is optimistic nor pessimistic. Isn't it much more likely that this species (despite having something that can be called "intelligence" in an appropriate sense) simply be so different that the difference is insanely much larger than between an human and an octopus?

Example:

Stanisław Lem; Solaris

> https://en.wikipedia.org/wiki/Solaris_(novel)

where the alien species is an intelligent ocean.