Why does it feel like grief when your parents turn out to be human?

Because it is a loss, and because nothing around you is treating it as one.

Kenneth Doka, professor emeritus at the College of New Rochelle and Senior Vice President for Grief Programs at the Hospice Foundation of America, named this disenfranchised grief: grief for a loss that is not openly acknowledged, socially validated, or publicly mourned. He was describing the losses other people don't count: an ex-spouse, a pregnancy, a friendship, a relationship nobody knew about. The grief itself is ordinary. What's absent is the apparatus around it: no ritual, no condolences, nobody asking how you're doing.

Finding out your parents are people fits that shape closely. Something real ended, and there's no word for it, no date, and nobody to tell. So the feeling shows up with no category to go in, and you conclude it can't be grief. It is. It's just grief nobody sent a casserole for.

Not the person. The version of them you were issued as a child.

Small children need their parents to be more than people, and get them that way: the fixed thing the household runs on, the source of the rules, the last word on what's true. That version was never a lie anybody told you. It's a structure a child builds because a child needs one, and it holds up for about twenty years.

What ended is the structure. The person it was built around is still in the kitchen, and is reachable now in a way the structure never was. You can ask them a real question and get a real answer. You can disagree without the floor moving. You can find out what they were actually afraid of. A fixed point is gone and somebody you can talk to is standing where it was.

Almost certainly, and with no more language for it than you were given.

Their own parents went from fixed to fallible at some point as well, and nobody marked the day. Whatever distance opened up got filed as simply how families go, and traveled down the line without a name on it. Nobody in the chain was ever handed a sentence for this, which is why none of them handed one to you.

Worth knowing for two reasons. The feeling isn't evidence that something went wrong in your family in particular; it's what this shift costs when it happens in silence, which is nearly always. And the person in the other chair has stood exactly where you're standing, which makes them an odd but genuine candidate for a conversation nobody in the line has managed yet.

Related: The Year You Became a Person to Them is the longer argument, and the one sentence that keeps this from turning into a fight about respect three years later.