Difficult to oust supreme court justices. Best to remove the marriage issue from the venue of the courts - state and federal. Congress can do that.
Then the people would have a stronger voice from state to state. The majority would trash any move to destroy the insitution of marriage, realizing that to change the meaning would create a chaotic situation where other paired, or tripled couples, a reduction of age limits allowing child 'marriage' and other strange and unconventional relationships would be able to claim equal protection and bennies under the blanket protection of marriage -- a word whose meaning is un-ambiguous and well-defined already.
If the same-sexers were only interested in obtaining legal recognition and protection so far as financial benefits were concerned, there would be no reason for them to steal the 'marriage' word. Other designators have been offered, but they refuse them.
They want the 'marriage' designator to claim morality, even if only by the gummint. Wanting to hide behind the skirts of the honorable institution of marriage only reveals their lack of pride in who they are and what they do -- otherwise they would use another word to define their status and couplings.
Then there is possibly a more devious reason for wanting to hijack the 'marriage' word. Has nothing to do with sex and everything to do with destroying the strength of America -- the family unit.
I do agree with you that the courts should have their power seriously curtailed, and not just in the area you are talking about.