what about your " cannot travel vast distances " remarks, which was your argument for non human life existence(aliens), remember, " no evidence"-- and now you leave this comment open-ended, implying that alien life exist.If it could be shown that this planet was and is the only planet in the whole Universe, that had evolved life to the peak of what humanity supposedly is, then yes, it may then be classed as unique.
Otherwise saying it is unique is just wrong.