If there was a right to marry, there would never have been restrictions placed on it.
Liberals are seeking to sweep away one type of long-standing restriction. But one can argue then, if its a right, why can’t every else have it also?
Common law marriages are a type of marital privilege sanctioned by certain states. They could abolish it if they want to.
That can’t happen to a right for those eligible to exercise it. Hence the difference.
Every other right has restrictions why would marriage be any different?