However, as is often overlooked, this isn't purely a debate about one's personal ethics and morals; marriage extends into the legal domain, and brings with it a plethora of complex legal ramifications. So, in fact, preventing marriage does impact an individual's rights.

I would also point out that “politically correct” is about as dismissive a term as can be found today.

Cultural attitudes may shift, and at some point a marginalized concept dismissed as “politically correct” becomes simply “correct.”