I completely get your point (and I just noticed some of my typos above that would cause confusion.. my apologies (like 'would' instead of intended 'wouldn't'... joy of current heat wave and no A/C as so rarely needed... anyway, I digress)
In our case, most users won't be making ANY changes, only running a live stream that was largely pre-configured. So OBS config is NOT the concern. at all. I understand point of saying different users wouldn't have meaning... but actually it would, as Event Logging who show logged in, and NFTS file log tracking would help identify/troubleshoot issues, vs a shared user account and you have NO idea whose been told the password, and who logged in, did what on the PC (OBS least of concern/issue). In a HoW streaming setup for a relatively small congregation, going for KISS, the option is sharing a single user login (and all the risk that entails, ESPECIALLY if that account has local admin, which is an even worse situation), or some setup with a shared OBS config (however accomplished) but separate OS login.
A shared OS login is truly unmanageable [impossible in our setting]. A shared user login = 0 security, vs challenge of managing/sharing an OBS config; which would be orders of magnitude much easier to deal with in the overall scheme of things. Having to manually replicate OBS settings (which would be desired state 99.9%+ of the time) across users seems silly, and error-prone. The only person who would want a unique setting (for ex, for testing) would be someone like me, who would know how to set up/save settings. ALL of the other users (volunteers) would simply want the OBS (and most other) settings left for them. [most won't understand OBS to begin, in any depth, and would want things made easy for them]
In our scenario, OBS overall settings don't change.. other than stream key per stream session. A new week brings simple changes where we update Sources with current weeks' videos, and resize/reframe/crop those videos [literally just update Source to point to new video, reset Transform, etc]. And then the number of videos/scenes will vary ever so slightly if we add an extra announcement, or a postlude, or similar [and update our automation with Advanced Scene Switcher].
So,
- so from a security, manageability, least privileged, perspective, a shared user account is a non-starter (something I'm unlikely to consider seriously, based on decades of experience)
- leaving how to have User A make changes to OBS settings and intentionally ensure other users on same PC get same settings