That is true. However, there are cultural differences in different parts of the world. These differences affect in interaction between groups of people that are not from the same part of the world.

I see this question asking about what it's like working with India-based dev agencies, taking into consideration cultural differences.

It would be just as valid if asked about other parts of the world.

To a lot of other people it is a clearly defined region, it might be a big country. But most customers have a very clear idea when you say "Agencies from India".

But you can answer that, by giving an opinion on development agencies in general.

It's only a problem if agencies in India are highly variable. If there is little deviation from the norm, it's not a problem. As such, the potential that this kind of question might be hard to answer is conditional itself.

Criticizing questions is not useful.