When we ‘bit the bullet’ and decided to become an ‘at home Mom’ we were also told that was a luxury. In the process we forfeited a very nice paycheck/benes, fancier car, eating out, vacations, etc. In exchange we got to have kids whose mother could walk them to and meet their school bus, take them to after-school activities, help with homework, lead the Scout/soccer/PTA, etc. Wouldn’t trade a thing.
I don’t disagree with your approach.
However, when you have so many kids that the kids have to become parents, you are asking for trouble, in spades.
Quiverful should be judged literally, not just figuratively.
A quiverful of arrows has to be able to be carried to be used.
The hidden knowledge in the Bible verse being, yes, children are a blessing, but don’t produce more than you can raise properly.
I am sure that limit is different for everyone.