This is what I have read so far:
https://www.reddit.com/r/spacex/comments/1lfayba/em_update_o...
So yeah, a QC problem, it seems.
With this one, given the seething hatred for Musk these days, I wouldn't rule out sabotage.
It's not the most likely cause, but in a world where people have been torching Tesla dealerships, I'm sure there's a lot of people now who really want to see Starship fail.
I think you're drawing a VERY long bow here. That's a long hustle, to work in a field where you'd get to be an intimate part of the launch control process at a company that is going to be very selective on who it hires because it can be, security clearances, and then be able to do this.
No, it's rocketry. Sometimes things go boom when they're that volatile to begin with.
We also have that Falcon 9 that blew in space due to a leak.
I think they're skimping on quality control.