Drag/drop to small targets, especially within lists and trees, can be a challenge to anyone with less than perfect fine hand/eye motor coordination.
There are places where I would gladly disable it. FX, I'm forever 'losing' bookmarks (or folders) in my browser's sidebar, invariably it's because at some time I unwittingly dragged a bookmark item or folder to another location.
In calibre I don't use the drag/drop feature of the CSV catalogue column selection. I find it easier to select all columns in default order, and then remove/hide and reorder the columns in CSVFileView or Excel.
BR
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