Earlier quoted context omitted.
> The state has a vested interest in procreation (i.e.: creation of new citizens & taxpayers as others die off), so takes an interest in "marriage" as a means for facilitating the most efficient & effective means of promoting procreation, doing so by giving special benefits in return for parents taking on special obligations. Expanding the beneficiaries of those benefits to those to whom there is absolutely no chance…
> So, you think marriage shouldn't be available for straight people who are both infertile? The rest of your argument around mutual care is reasonable. There are more nuanced views than a blunt "if state support for marriage depends on procreation, let's ban marriage for infertile people as well.", which sounds like spite: if I can't get it, then those guys over there should not get it either because they are similar…
You're just trying to rationalize your prejudice by pretending it's about fertility.