That is not logical - why did they allow him to BOARD the plane and get seated? Why remove a passenger already in their seat? That makes no sense at all.
His luggage was probably checked too and carryons already tucked away.
Glad that I don't fly anymore.
Mistakes happen. They may have had a last minute order to get crew onboard. If they need the seat, they’ll get it.
Like I said, it’s unfortunate but that is what happened. That’s why you are compensated with a nice check and confirmed seat.
Passengers with airline “status” trump all other “lesser” passengers. Because Beat-Up-Man appears to have found himself the least of the lessers, he can now expect to receive First Class “status” treatment for the rest of his natural life.