It's really not about controlling people and personality. It's about verifying identity so you can have trusted relationships with people. That's at least one of its many use cases.
In a small perspective, let's put this forum as an example. Think about all the scams we would be able to avoid if developers would need to verify their identities before being able to announce their projects here. It would be in their best interest to not scam people with the project because the moment they try to do it, investors can give those people bad reputation, kinda like the reputation you can get here in the forum. The flaw with the forum's reputation is that it's linked with your username/email so it only takes you to get another account to keep scamming people. The main difference with biometrids reputation is that it damages or benefits your unique identity worldwide. There's lot of scammy developers that release multiple coins, all of them pump and dump schemes, one after the other one, and people fall into this scams every time. This type of identification can filter out all these scam projects preventing the same people from doing repeated scams over and over again.
This type of identification is much needed especially in this digital era.