The objective here is to give script kiddies and other spray-and-pray attackers the finger.
You light up in a skid's Internet-wide scan for let's say Redis. They try and fail to dump anything from it so they proceed and run a vulnerability scanner on your host (skids gonna skid)... It proceeds to discover IDK... a trivial SQLi you coded like a dumbass...
If more servers use the tool, they waste attacker's time. A bit like herd immunity
For a similar concept, look at the delay you get after entering a password wrong to a login prompt: That technically does not add any barrier whatsoever, but it does make it much harder for an attacker to brute force the password.