Earlier quoted context omitted.
> The core issue being that for the poorest of the poor, privacy is secondary to survival. Privacy is probably not on their radar. However, Aadhaar is an authentication system not a tracking system. So privacy is not even relevant here but please correct me if I am mistaken.
Yes you are right in that Aadhaar is currently an authentication system and not a tracking system. But there are definitely instances where Aadhaar data has leaked (not the biometrics, but identity information like Name, Address and Phone numbers) which rightly calls into question privacy related issues.
Aadhaar isn't the only biometric database in the country.
[0]: https://www.medianama.com/2018/02/223-gujarat-bleeds-biometr...