Only if its the last hard link. If nothing else, its a wee bit of insurance from deletion since no single link removal should remove the file.

Anecdote, eons ago, we had a problem where the vendor needed to log in to the machine with the intent that they were going to upload some utilities, fix a problem, and then delete them.

Before I let them in, I set up a script that constantly scanned the directory tree they were in, and hard linked everything so I could look at what they were using later.