Yes! I missed that part. It's correct that it means that they only strike on the rough part of the box. The safety being in the fact that they don't spontaneously ignite.
Yep. That's pretty much correct.
Edit: except for what the comment above says about the safety part.
The best guess I could find online about these with 5min search Sorry for r*ddit
Although, I think safety matches are ones that will only strike on the rough side of the box, rather than a wall or chin stubble.
But I rather like the idea that they have matches that don't burn all the way down. https://www.britannica.com/science/safety-match
Yes! I missed that part. It's correct that it means that they only strike on the rough part of the box. The safety being in the fact that they don't spontaneously ignite.
Yep. That's pretty much correct.
Edit: except for what the comment above says about the safety part.