Yes "cultural differences" have sometimes their roots in the infrastructure or economy of the country.

I remember some years ago that my (french) boss was often frustrated with our indian colleagues being late or having delays in their work. Then I spent an internship with them and I understand. It was much harder for them to go from their home to the office and the conditions were far worse for them.

But it's hard for a lot of people to realize these differences and empathize without having to live under the same circumstances.