If you actively edit/delete some system files non-essential for boot, but that would break some integrated features, sure. But random corruption of protected system files? If that happens, you’re not fixing anything without changing your storage and/or the rest of the hardware anyway.

It worked for me on an issue once. Which, tbh, is worse than it never working, because it gave me hope and a reason to keep trying it in the future.

Same.

I reinstall my windows partition every like year.

I have had DISM work a handful of times for work. SFC has never fixed anything.