You are in the US and you apply for passport renewal.
So you send your passport to the embassy and fill the form.
Then you are told that in India the police are verifying your address.
For some reason they fail you. Could be because you don’t have an address proof or an address at all back in India.
Then you don’t have a passport and you are stuck in the US. What happens then? How can you ever travel back to India?
Some of you might say the renewal happens first and then police verification happens in India.
Ok. Let us say the embassy renews your passport and gives you a new one and police verification starts later. So you have a new passport. And police verification fails in India and they cancel your passport. Then how do you ever travel back to India?