Well, generally speaking, this is a feature enhancement not only I would be using, so it's not specific to my own personal situation. There can be many living situations where Pi-hole admins might want this feature.
In my case, I use LastPass, and accidents can happen; the LP activity timer hasn't timed out yet, leaving my passwords available; browser form fills saving the info; lots of possibilities including unforeseen ones. Nothing wrong with adding an optional security enhancement, that users can choose to enable or not. No?