Oh, I hate that phrase with the fiery passion of a thousand suns. Baby daddy too. Of all the stupid, bad karma, shitty things to say.
You don’t downplay the parenting contributions of the one who is doing ALL the parenting.
That phrase gives ownership and recognition privileges to someone who can’t be bothered to show up.
Fuck that.
Let’s stop giving deadbeat parents a free ride and a pass. You’re either a parent or you’re a sperm/egg donor.