Reynolds was wrong if that is what it says.
Even if not for the explicit limits in Art 1 Sec 8, there are further limits in art 6 para 2, the 1st Amn, and the 14th.
The Courts can exceed their legal authority as easily as Congress.
Just what in the hell do you think we are trying to “conserve”?
Please show me evidence that marriage has ever been defined in the Constitution as something other than as one man and one woman. Any other definition will suffice.