There's a massive visible crack in a frame that you couldn't have missed if you're assembling the car... that's beyond defect to intentionally and actively contributing to harm.
It's the same level of malice as knowingly installing an odd brick of brown putty in the steering wheel instead of an air bag. The worker clearly didn't know C4 doesn't belong in a car.
Article isn't really about the crack, it's about the fact that Tesla refuses to acknowledge it's a safety issue. They won't even acknowledge that it's cracked in writing, only verbally.