SharePoint Migration Tool - migrate only one library

SharePoint Migration Tool (SPMT) version 3.2.119.0

I want to migrate one (1) library from SharePoint 2013 to SharePoint Online.

The source library is simple - no custom fields - just a lot of folders and files.

When I set up the migration task I select this specific source library only. Tried both GUI, CSV and JSON.

After the task completes the destination site ends up with all kinds of lists and spweb/spsite settings from the source... Is it not possible to have only one (1) library migrated? Why does it activate publishing features and all kinds of settings?