That’s because the kid is registered with the Standesamt anyway. Those sovcits don’t want their kids to be registered with any government agency as they are afraid this would mean something nasty for them. So pregnant sovcits try to avoid doctors, hospitals, and even midwives to prevent anyone from registering the baby in official documentation. Which means they give birth at home without any kind of medical assistence. Which in turn usually means a high (double-digit percentage, actually) risk for the baby or mother to die, but that is a risk they are willing to take.
The reasons given for not wanting the baby to be registered are not really clear - something about a fortune the government would own to the people, but somehow having a birth certificate would allow to state to withhold the money or something like that.
The whole issue is not about the piece of paper titled “Certificate of Birth”, it is about being registered as “Citizen” with the name in ALL CAPS by a government entity. They consider themselves as “American Nationals” instead of “American Citizens”, because “Citizens” are people (“subjects”) who are “subjugated” to the government.
Does not make much sense to you? Don’t worry, it does not make sense at all.
The other core believe I seem to have figured out is that they think the government owns them money - loads of money! - when they are not “American Citizens” but “American Nationals”. That’s why you can regularly read about sovcits trying to pay off credit card debt, the fat new pickup, the mortgage, or child support with a mysterious “voucher” or silver coins.