Single motherhood tends to be a ticket to poverty and impoverished parents can’t provide kids as much resources to support their education. Poor kids are more likely to have to enter the workforce sooner to provide for basic needs. An abortion might have allowed the parent to have more earnings and stability before raising a kid. Also plenty of anti-abortion activists are hypocrites and will make excuses for why their circumstances merit an abortion while everyone else needs their access blocked. When their kid gets raped by an uncle and can’t get an abortion, they will be left with an extra child care burden too that might have otherwise been negated with a secret abortion.