Now if we could just get the right service at the top at the right time with some assurance... ;)
The Army has had more than its share and there was indeed Pace, of course and I do not question that all of them have been able to put parochialism aside, truly. The Vice is always of a different service but he is not in loop to advise the Prez, only the Chairman is statutorily. A smart President will ignore that and Bush obviously did and has since.
My point was not parochial but that a deep seated knowledge of capabilities and limitations may not be there at the appropriate time and a fuss budget Prez or SecDef may hew to the letter of the law and not seek advice elsewhere. It is IMO not a big thing, just a minor glitch in the law.