I’m sorry you can’t see the privacy implications of Aadhaar. If it’s easy to track every single place you go and every rupee you spend, it affects you in a few ways
Citizens start self censoring themselves. They subconsciously stop engaging in activities that are legal but might be traced back to them. I’ve personally done many things that I’d rather people didn’t know about. I might have dabbled in substances, for example. Maybe I might not have done that if I had known that the eye of Big Brother was watching.
You say elsewhere you’re confident that whatever the abuses of the government, we’d be able to vote them out. With the tracking ability they’ll have in a couple of years, that might no longer be possible. Who would show up to a protest if they knew the govt would be able to track them there?
Ultimately it comes down to this - Indians enjoy a lot of privacy and anonymity because they’re one amongst 1.3 billion people. Paradoxically they don’t value this much at all. Given a chance they’d gladly trade privacy for wealth. It’s not my place to say if that’s a good trade or if they should make it, but you don’t really know what you got till it’s gone.