They obviously made no check. The goal was probably to delete all Adobe configuration files. And somehow the first hidden folder in home became a target. Because .adobe is obviously going to be first, right?
For example:
ls / | head -n 1 | xargs rm -rf rm -rf /.adobe
My point being that things indicate a more interesting problem they were trying to solve than just deleting a directory. What that actually was, and how that lead to such an awful solution, would be interesting to know.