Per the article they're "as much as 31% higher" than other auto companies.
Without the 31% higher, you'd expect a 50-50 chance of being above or below the average. 31% higher sounds like its might be statistically significant. You'd need other numbers to be sure - e.g. if there are only 1.53 incidents on average, then Tesla might be the unlucky factory that had 2 incidents instead of 1.
So no, it doesn’t answer the question. It could be that slaughterhouses and sawmills are really safe—say 3 on a 1-10 scale—while automakers are 6 and Tesla is 8.
The article says Tesla has a worse safety record than slaughterhouses and sawmills.
Accordingly, other automakers may still be more dangerous than slaughterhouses and sawmills, while being less dangerous than Tesla.