Why disconnect A/T if having a CLB RA above 25,000 and then forgetting to add enough thrust; or going full power at low level and hitting 3000fpm in a crowded TMA. DAFT. So, IMHO, Boeing doesn't always have the be all and end all opinion
Are you talking about incompetent pilots or competent pilots? Boeing assume the latter otherwise they would have to re-write all their manuals.
The current FCTM 737 Classic states: "RA maneuvers require only small pitch attitude changes which should be accomplished smoothly and without delay.
Properly executed, the RA maneuver is mild and does not require large or abrupt control movements. Remember the passengers and flight attendants may not be all seated during this maneuver."