> Just imagine getting into Tokyo subway with a stroller for 2 kids. There's a reason why Tokyo fertility rate is below 1.
This is a glaring example of hunting for data that supports a preexisting belief, rather than basing beliefs on empirical data.
To point out how absurd this logic is, consider that it fails to consider the fertility rate of Japan as a whole outside urban areas, as well as failing to account for the many other extremely dense cities outside Japan that do have very high fertility rates.