Controlled compromise of privacy for the sake of scientific insight seems like a good idea, until you realize that we either get profoundly non-replicable junk "science", or continued and unlimited re-breach of privacy for the sake of replication. Neither is any good.
I'm reminded of Raj Chetty who publishes papers based on exclusive access to IRS tax return data. (https://www.sciencemag.org/news/2014/05/how-two-economists-g...) Not real science unless you can have access to that data, too. You can't.