Americans often do service as a self-selected sacrifice that can be abandoned anytime they feel the burden becomes too heavy to bare.
However the way of Christ is solidarity. Oneness does not allow separation for the sake of escaping personal discomfort. One-ness, solidarity, true beloved community requires linking our destiny with others so that we share in joy AND in pain.
This is one of the reasons I now work in construction and not in a college. For the most part, I like that; solidarity has taken me places conformity did not know existed.