the kind of time when a tool that is good at measuring such things won't ever even attempt to load.
So thick black tape it is. (Can't do anything about this voice screaming the headset's status though.)
LEDs that are too bright on my laptops get similar treatment. I try to leave them a bit visible, enough to see in a dark room whether they are on, but the laptop not sending light including when it's suspended is more important.
Only if your system is working fine.
Only if you are okay with switching the context.
'Flashing lights' aren't the best troubleshooting tools, but they are OOB and works constantly. Frantically flashing HDD LED would say you about why the system froze for a couple of seconds way sooner when you oculd launch some performance monitor things.