This may have less to do with morals and more with populations adjusting their growth as needed naturally.

The population of world Jews has still not recovered from the Holocaust, and needs exponential growth to catch up.

Most other developed countries have saturated populations due to advances in medicine and life expectancy, and a downward adjustment wouldn’t hurt them, and is likely to lower the price of housing and food etc with lower demand.

As soon as those populations go below a certain point, growth will kick back in - if only because the minority of the population who do want more kids will grow faster, and it will be easier for them as resources will have become cheaper.