To answer your argument about Bangladesh food. Assuming McD is not worse ( I have no real data to say either way ),I am not sure it is a good argument either. You, typically, want your kids to do better so if McD is that upgrade, then I really cannot fault you for this. We all approach this with resources at our disposal.
Just to make more interesting. In the old country, the diet is heavy in fats of all kinds ( partially due to history of the location and, well, cold weather ). Despite its flaws, I would argue its still better than McD on most days.
Same kind of fat? Same kind of carbs? Same amount of fibers? Same amount of minerals and vitamins?
Sounds a bit like you are trying to provoke a discussion about this.