I don't think that every issue needs to be solve to the root cause. There are plenty of times something goes sideways on one of my computers and a reboot fixes the issue. I'm fine with that, but if it occurs more than two or three times, I do need to solve the problem.
It took me a while to learn this lesson. There are too many one-time problems that happen, so I learned not to even worry about something unless I see it at least twice. This is one piece of advice that I think should be passed on to just about anybody in a troubleshooting role.