Your response is "why are you doing X, you should do Y"

Because they're right, you shouldn't do X. I know that's not a satisfying answer for most people to hear, but it's often one people need to hear.

If the process must run as root, then giving a user direct and unauthenticated control over it is a security vulnerability. You've created a quick workaround for your issue, and to be clear it is unlikely to realistically cause you problems individually, but on a larger scale that becomes a massive issue. A better solution is required rather than recommend everybody create a hole in their security like yours in order to do this thing.

If this is something that unprivileged users reasonably want to control, then this control should be possible unprivileged, or at least with limited privilege, not by simply granting permanent total control of a root service.

This is ultimately an upstream issue more than anything else.