>like that 5.4 TFR
Oh I got it only now, you've taken the average 2.7 kids for population parity and you've multiplied it by 2. That's assuming half of all fertile women don't have kids, in that case the 5.4 kids per woman would be the minimum to don't have the population decrease.
Keep also in mind that "kids not birthed" (or aborted) is not the only negative factor influencing population growth, for which is necessary to have extra kids to cover the empty hole left in society by those missing persons.
Every kid dying before growing and starting their own family is a negative factor, meaning one more kid must be birthed to cover for that missing person.
Every kid getting troonized and becoming (((mentally infertile))) is a negative factor, so one extra kid must be birthed for every troon existing.
Every person reaching the end of their fertility without having started a family nor having generated kids is a negative factor, so one extra kid must be birthed to fill their absence.
Every couple not having kids, either because of reproductive defects or by ideological idiocy, is a negative factor, so two extra kids must be birthed for every couple failure.
Every couple not managing to have enough kids because their house is too small and the prices of food are too high when compared to their income, is a negative factor, so extra kids must be birthed to cover for the absence of kids from those couples.
And so on for every time an human being failed in his duty to carry on the life of his cultural group, one extra kid must be birthed for every human failure, because any population can't just allow its failures to drag everyone down.