Fiery Keeper of the Hat
You know Devor it is alright for people to have different opinions.
What....? Since when?
In all seriousness, though, just because something is subjective doesn't mean you can't determine real facts or conclusions based on it. There's a reason publishers make the choices they do about bios, and a reason that the "general advice" is the way it is, and that the industry trends have been set. It seems spurious to dismiss all of that as a mere difference of opinion.
A bio is not an author greeting. It is a resume designed to build a writer's credibility, not likability. And the third person POV is far more effective at doing so.