Let's take my analogy to a ridiculous extreme: desegregating public showers. Right now you, me, and everybody else on the planet agrees that this would cause the world to end. Just like the vast majority of the southern whites thought that the world would end if racial segregation was abolished and the vast majority of people believed that gays were sick freaks. Yet I've personally seen no scientific evidence to substantiate this.
If society and media relentlessly portrayed such showers as being a routine, mundane manner instead of a taboo sexual fantasy and emphasized that males acting on their instincts were low class scum, you could plausibly argue that the situation would be no different than women wearing skimpy and provocative clothing in our everyday lives. In 1900 bear arms were considered to be utterly scandalous, and modern bikinis simply unimaginable. The only countries today that actually protect women in this regard are Muslim.
This is the door you are opening by mindlessly cheering the end of thousands of years of gender restrictions on marriage. Nobody in the 1960s civil rights movement had the faintest idea that their activities would later be used to justify homosexual marriage.
once again, there would be literally nothing wrong with this. why are you fearmongering about it?
