Rich failsons tended to be given safe and cushy posts, and even beyond that most American soldiers in Vietnam survived. Literally no one should join the US military ever. It is always a worse thing to do than not doing it is.
Hypocrisy literally does not matter, GOP hogs do not have shame or moral beliefs, they do not have principles, they are literally just ravening demons wearing human skin who subsist on suffering and death and who do not perceive material reality or remember what they had for breakfast this morning. You're not owning them by accusing them of at one point doing the less bad thing when moral consistency would suggest they should have done the more evil thing which they advocate for, because they don't care, literally no one cares.