And I think they would be evolutionary developments to a being which had evolved much like Homo Sapiens Sapiens.

We look for life on Earth-like planets. The assumption is that life would evolve much like ours. It would have to defend itself from predators and have a reason to develop large brains (computing and regulating power) and consciousness.

Communicating like jellyfish or whales, or bees and ants, would have to develop in a creature which had a use for it, an ability to do it, and had survived the evolutionary process with an ability to manipulate it's environment.

There may be other ways for conscious beings to develop technology, I'll agree. And it's understandable that humanoid figures are used to denote aliens. And as a matter of fact, they often are depicted as having extra-human abilities such as you mention.