"Most people provide post hoc consent." A common claim.
The claim: "Spoiler: most people provide post hoc consent.
The OVERWHELMING majority of human beings, when asked, would prefer to have been born."
No matter what religion you believe in, the OVERWHELMING majority of human beings disagree with you so significantly that, when asked, say that you are going to hell. Understand that these deeply held religious beliefs (that the OVERWHELMING majority of human beings disagree with) are /why/ people say they would prefer to have been born. So, no matter how you slice it, the OVERWHELMING majority of human beings are wrong about why they say they prefer to have been born.
Spoiler: There is a huge selection bias with your claim that "most people provide post hoc consent" in that unknown significant numbers died before they ever reached the age of consent- unknown numbers died before they even left the womb. As is the case with junk data, selection bias junk data in your claim, Garbage in. Garbage out.
Baby deer unavailable to be asked if they would prefer to behave been born...
Komodo dragons prey on pregnant deer and their fetuses
https://www.youtube.com/watch?v=kaWurdjH5bA
But, lets say that there was only one child that had things so excruciatingly bad that they wish they'd never existed such as in Ursula K. Le Guin's "The Ones Who Walk Away from Omelas." Would you agree to have the perpetual misery of a single, neglected child pay for your happiness? What if upon agreeing to an Omelas society arrangement, big burly men hoisted you out of your chair to inform you that you had just "volunteered" for perpetual misery? Since a drowning person's survival instinct causes them to panic to such an extent that they will even pull down and drown their would-be rescuers with them, you would be dragged kicking and screaming in panicked terror all the way to such a perpetual misery chamber, and that would be merely the beginning of your perpetual misery.