But…God also made many heterosexual unions unable to have children. Therefore, should they not have married? Most think not.
The sun rises in the east, sets in the west. It provides warmth and light.
Except for…
when it’s night,
and winter.
So, because the sun is not always producing light and warmth for our us, by your rationale, we should also call the moon, “sun” . We should deceive as to the objective nature of the moon and sun then.
Right?

Objection 1): welll, the sun is still producing light, we just can’t see it.
Answer: yes, the sun has a nature, a form, and a purpose, whether it is producing the results it is ordered to at any given time or not.
The way the sun
is, is not determined by results. It simply
is that way, by nature.
.
.
.
.
.
But…the Catholic church and others have not always thought or found that tradition is best.
For example, in the Church it used to be tradition that priests married and then the church changed that. It used to be tradition that mass was in Latin, but the church changed that.
It used to be law as per the Old Testament that a rapist had to marry his victim. After much thought and time, we have changed that.
Therefore…just because something is tradition, doesn’t mean it is best.
As per “Natural Law”… the dictionary definition includes:
An observable law relating to natural phenomena.
Natural phenomena shows that in humans and animals, it is observable that some are naturally attracted–emotionally, physically, mentally–to the same gender.
So Natural Law could be an argument *for *same-sex marriage.
Word games.
Homosexual behavior is observable in nature. That proves that…
guess what…
homosexual behavior is observable in nature.
Ok
Now what?
Surely you’re not trying to claim that because homosexual behavior is observable, it is the same thing as what has always been considered “marriage”?
You are playing word games, not making a rational point.