Well, yeah. They have to go through them to determine if they're relevant. Same reason a physical search warrant will let the cops seize a vaguely defined bunch of stuff from your house.

In particularly sensitive cases, the judge may appoint an official to be a go-between between the evidence and the prosecution. For example: https://miami.cbslocal.com/2018/04/26/special-master-evidenc...

The court order is the determination that the information has enough probability of being relevant that it needs to be turned over to be reviewed.