Use case is taking a copy (via say tar) of a directory hierarchy on a MacOS drive, and copying that to another system (Linux), and untarring... then you've got all the .DS_store files everywhere...
I tend to do rm **/.DS_Store . I know it’s slow when there are lots of files, but it is still quicker than opening a man page or Stack Overflow to figure out what the hell the syntax is to do it with find.