Well, the drawback is that philosophies and beliefs are static, relationships are not. Relationships are dynamic and ever changing. While my heart agrees with your sentiment 100%, how does one love and cherish someone who either doesn't (or can't) love you back? The greater (spiritual) love is *always* there, connecting all things... It only gets complicated when you confuse the greater love with "the lesser loves" (romantic, debased, or narcissistic) and how individuals views on those four differ is where all the "craziness" happens... (then it gets into the mirrored beliefs and reactions to both self and others' perspectives of those same factors).
It's up to us to try to define ourselves in the middle of it all.