Most distant matches go wrong over practical things nobody asked about, not over personality. These are the questions that prevent it, and none of them is rude.
Where would we actually live
Not the country — the house and the arrangement. Alone, with their parents, shared with a sibling. In which suburb, and how far from anything.
People agree to a country and discover a specific life, and those are not the same decision.
What would I be allowed to do
Work rights on whatever visa you would hold, and when they start. Whether your qualifications are recognised or you would be retraining. Whether you could drive.
A person who has looked this up for you has thought about you. A person who says it will be fine has not.
What happens to the parents
Theirs, usually still in India. Who visits, who pays, whether anyone is expected to return.
And yours. How often you would realistically see them, and what that costs. This is the most common source of unhappiness in these marriages and the least often discussed in advance.
Is anybody else there
Family, community, friends. A city with an Anglo-Indian association and a few dozen households is a very different prospect from a town where you would be the only one.
Loneliness is the thing people underestimate most, and it is entirely predictable from this question.
Two more, quietly
Do they intend to stay? Some fully mean to return. Others have not been back in twelve years. Either is fine, mismatched expectations are not.
Have they done this before? A family that has already married somebody out from India knows how it goes. One that has not may be underestimating it as much as you are.
None of these questions is unromantic. They are the difference between agreeing to a person and agreeing to a life you have not seen.