You're correct about choosing between theories, but I think what's being challenged here is how we're determining if something is unlikely or not given our imperfect knowledge...and how it was described in the article. I'm not making the case for aliens here.
Why is it so trendy to discount the possibility of aliens? Your comment and the article have specific, nearly-foremost intent to do that.
There's no evidence it is aliens. Obviously it could be, and it's unlikely there are not such things in our universe.
It just seems more appropriate to say "there's no evidence it is related to alien tech." Everyone having to say "it's NOT aliens" seems like some sort of cultural phenomenon.
