There is no way I will ever support monkeying with the Constitution for issues like this that clearly should be decided by the states.The Constitutional amendment is required to make it an issue to be decided by the states. The way things are right now with the wording of the Constitution, if one state sanctifies a marriage, all other states are bound by the Constitution to recognize the marriage.
The proposed amendment prevents that and puts it back to the states, where it belongs. The amendment is perfectly in line with your stated desire, while the status quo is not.