I don't think of the characters as nationalities. I do not live in India. Playing people from different backgrounds, including Indians, comes easily to me.
Many Latino kids should become scientists because we need scientists all over the world from all different backgrounds. We have many tough problems, and we need everybody's help to solve the problems.
We live in diverse communities with all sorts of people from all sorts of different backgrounds. The more our entertainment can be a reflection of the world we live in, the better it is for all of us.
I don't even think places like the National Youth Theatre (NYT) are necessarily about wanting to be an actor when you grow up. They're about meeting people from different backgrounds and different religions and different cultures, and mixing with people that you wouldn't ordinarily meet.