We've really gotta adopt a new term for this stuff. It's fine to be pedantic and say "well 'UFO' doesn't actually mean aliens in the first place", but the acronym has clearly been co-opted by pop culture to be closely tied with aliens for decades now. Even a minor change like "UFOB" (which has been used by the USAF officially) would probably make a big difference. People will continue to say UFO to mean aliens, and that's fine, but official press releases can use a different term so that people don't read the headlines and immediately think "wow, aliens!".