Well, it’s kind of like the same thing as running as root on Linux system all the time. It’s not just respecting boundaries, but not accidentally walking over them when you don’t realize they’re there. Some things, like going into the settings aren’t going to happen by accident, but there seem to be a lot of little things where admin bypasses the configuration without any indication that there’s something being bypassed…
As I said above, having a second account isn’t really great, because I’d only see that accounts notifications infrequently.