My wife and I are old. We were old when we married (40s, not totally functionally too old to have kids, but few people want to get pregnant at that age) and we’re collecting Social Security now. And I read the “sensible reasons” why same sex marriage is “wrong,” and most of them apply to us. Or I read the reasons why old people should be allowed to marry (wait, what — allowed to?!) and they apply to same sex marriages.
These people going after same sex marriages will be coming after post-menopausal cishet couples next. Just wait.