^so under the point you agree upon had the Enterprise returned second it would have been put into the Fleet Musuem under the configutation it was under Kirk's command. Why would the same not hold true for another one of the Constitution Class under that same configuration.
Only under the idea that Kirk's ship was the most notable of the Constitution-class ships because of his five-year mission.
Otherwise, if the plan was to upgrade the Enterprise
and keep her in service, I see no need for any Constitution ship to be placed in the Museum until the last ship was retired from active duty, and that ship would have been the final version of the design.