Asklemmy

The government stuff is more about not wanting anyone to feel like they'll be ridiculed and their career will be over if they talk about seeing things they can't explain in case that thing turns out to be some new technology developed by other people. And that there might be ways the laws of physics behave to make weird stuff show up that we don't understand, so studying it could result in improvements to our understanding of physics. There's no credible evidence of aliens that has been uncovered by any of that.

You can see it in the renaming of UFO to UAP. UFO stands for unidentified flying object and never implied aliens were the ones flying the object. It was changed to unidentified aerial phenomenon because UFO did imply that whatever was seen was flying and an object when it could just be refracted light in some cases, which is neither flying nor an object.

I want to believe but there isn't a good reason to do so at this point.

And there is non-human intelligence on earth, but outside of humans it's only used for problem solving, communication, and basic tool use. I'm not even aware of any animal that uses tools to make other tools other than humans and maybe some of the other extinct hominids, which would be a requirement if you're saying non-human intelligence on earth is capable of creating UAPs. Unless I'm misunderstanding what you mean.