It says "if indeed that's what UFOs are" in the opening paragraph. Qualifiers make it speculation, speculation is not certainty, is perfectly legal, and I've assumed only that their technology level would be sufficient to reach us (and all that entails).
I post text here, often accompanied by images and sometimes video. People then clap or don't depending on whether they enjoy what I posted.
Love podcasts or audiobooks? Learn on the go with our new app.