@_elena IMO it depends more on what they do with the data than whether they have it.
Having healthcare data accessible from one place with proper security measures so only healthcare institutions can access it is more efficient than having it scattered everywhere, and having this data readily available when the patient is unable to provide it is necessary for providing proper healthcare.
Collecting anonymized analytical data is helpful for finding ways services can be optimized even though some data may be able to be deanonymized.
Forcing corporations and wealthy and powerful people to be transparent about their actions and finances can help them be held accountable for how they abuse them. In this situation privacy can actually be a bad thing and it doesn't help make society more free.
Collecting data for ads, profit incentives, or human rights abuses is just bad though so privacy is very important here.