is that this is not a matter of equality.
How is denying a person the right to marry
not a matter of equality?
Historically, cultures don't marry gays.
Historically, cultures engaged in slavery. Historically, cultures treated women as property. "This is the way its always been done" is a bullshit arguement.
Marriage was designed to unite heterosexuals.
At one point marriage was designed to unite heterosexuals of the same "race". Things change, get used to it.
Changing the custom of millennia is not a good idea for the health of society
Why?
*not an actual doctor