you are right but what do u think about soldiers who are fighting on the borders? Are they taking care of their mother back home? They take care of the Mother India.
This is what every Indian must understand. First is the place where they born and where they are citizen of and second is their own parents and then family.
Now for Narendra Modi, he has left his house when he was very very young and become a full time "Pracharak" in RSS. means he has commited himself in serving to country not himself or his family. Thats why, he is utmost honest and even his brothers are living simple life. They are not in high post of Govt or etc.. Plus his mother is living with his own brother and he is taking care of her nicely also.
so...... I think, you are satisfied with my answer.
