Not sure if you're from or are in India. Aadhaar is for residents in India, not just citizens. Anyone who's been resident in India for 180 days is eligible to get it. Since Aadhaar also has an "introducer system" where one can apply for it without any documentation but with an Aadhaar holder vouching for them, almost anyone in the country can easily get one.

The passport office accepts Aadhaar as proof of identity and proof of address. So any resident can get an Aadhaar and then get a passport, effectively getting citizenship!