As you say. Rootkit malware is pretty horrible stuff, but the fix for it is liable to be a bit dangerous, too, I suspect.
I used to do quite a bit of beta testing, but I gave up beta testing the MS operating system early on, because if it goes bad, you’re screwed. Too much of a risk for me. So I have to look at reports from others, FWIW.
I thought buying version X.0 was beta testing. ;)