The Microsoft support forums are on a whole level of their own, when it comes to being useless.
sfc /scannow and the troubleshooting button in the settings do fuck all, and compared to the usual systemd journal, the event log rarely gives you any useful information whatsoever
sfc /scannow does fix certain problems, just not nearly as many as the Microsoft support forum would like.
I do agree with you on the log, although that's often because whichever component is misbehaving just doesn't believe in error logs. I'm looking at you, Nvidia.
It's at the level where, after spending hours there, I feel like it has to be a conspiracy to waste your time. Because there is no way there could organically be that many posts about a topic without there being any useful or correct information.
I have never had ms troubleshoot button or autofix button ever do anything but return "no problems found".
And yes, I've also tried it in every one of those 20 control panels.
Actually I had an issue where trying to sign into my samba share caused explorer.exe to crash constantly, running sfc /scannow fixed it surprisingly. Glad that's on my "these programs only work on Windows" system.