I agree. but that only applies to single pilot airplanes where there is no opspec requirement for an SIC. When the type or opspec requires 2 pilots the PIC (name on release) logs pic even if he is asleep. Air carriers alternate legs between Capt/FO so it would be ridiculous to say that the captain cant log PIC when the FO is flying.

Ref.
61.51 (E) (iii) When the pilot, except for a holder of a sport or recreational pilot certificate, acts as pilot in command of an aircraft for which more than one pilot is required under the type certification of the aircraft or the regulations under which the flight is conducted