That is a reasonable point. Would you accept that the President's or Congress Critter's son or daughter is not sent into combat because they are "more equal" than the rabble that they send?
To me any discussion of equal value wouldnt come into it.
I would say that it would be wise because of the strong emotional links between parent/children and risk of kidnapping etc.
To me it would be a completely rational/pratical issue of handling psychological/strategical effects/issues.