Probably because you talk about size of population on the level of countries/continents which is clearly irrelevant to the question here (where population of an

Probably because you talk about size of population on the level of countries/continents which is clearly irrelevant to the question here (where population of an individual city is what matters, at best). So not distaste or disagreement, but irrelevance. If you think "Europe has a smaller population than US" is relevant to whether using public transport where the infrastructure exists is possible for families then you need to state why more clearly.