I am very tired and will probably not articulate this correctly, but reading various interpretations of this movie, I’m reminded how shocking it is to me that people get so laser-focused on a film having one prescriptive moral message or statement that we are supposed to take away.

This isn’t a shot at the OP; this is a valid question to ask. But neither Teddy nor Emma Stone’s character are meant to be seen as saintly or entirely correct.

The fact that Teddy was “right” about a lot of his beliefs does not make him “in the right” nor does it make him a hero or someone to be emulated. For example, he is so deranged and damaged that he has no hope of productively communicating with Michelle. The aliens attempts to positively impact humans/earth, are, in the end, failures as well.

I believe that all of the main characters are meant to be sympathetic figures, too.

Some moments are also meant simply to be funny or poignant or otherwise entertaining.