Well yeah, that's how that works.

They show up at 6AM (or whenever it's still dark), bang on the door, and have 10 or so armed men standing on your front door.

The goal is to scare the fuck out of your employee and hope they start babbling and give them enough that can be used to flip into a more specific warrant to go after a bigger fish, repeat.

The cops do this because, of course, a bunch of men with guns at your house in the dark is exactly the kind of thing that makes people lose their ability to behave rationally and so it's self-incrimination time. (Don't ever talk to cops, ever.)

Straight up jackboot intimidation nonsense.