Well, the author is wrong, in first person or third person.
Marriage law has already been reformed, and the legal meaning of marriage and family has been dramatically altered.
Encroachment by the state into the institution of marriage doesn't alter the meaning of marriage one whit. The meaning of the word is clear, the union of one man and one woman.
The fact that you have an axe to grind, albeit a valid axe, with the state vis a vis no fault divorce and its myriad consequences does not mitigate the fact that there are other axes that need grinding which are just as, or more vital, to the survival of the institution.
I find the notion that only "divorced Dads" can lead the battle to preserve the institution of marriage unconvincing.