If you hit something hard enough to pinch flat a clincher, instead of killing the non existent tube you kill the tyre instead - the sidewall gets a cut as the rim slices through it.
You can pinch flat tubs this way too although it’s slightly less likely.
Amusingly I’ve never worn out a tubeless clincher - every single one has died this way, or the sidewall has worn out before the tread.
Because they are light and weak.
If you hit something hard enough to pinch flat a clincher, instead of killing the non existent tube you kill the tyre instead - the sidewall gets a cut as the rim slices through it.
You can pinch flat tubs this way too although it’s slightly less likely.
Amusingly I’ve never worn out a tubeless clincher - every single one has died this way, or the sidewall has worn out before the tread.