Read before attempting: https://newyorkerbagels.com/bagel-safety-dont-be-an-er-stati... Seriously. As any nurse about a "bagel injury" and they will know exactly what you are talking about. It is so common that it is addressed in some military first aid courses.
For problem number 1 listed in your link, the YouTube video I posted elsewhere in this thread is a solution. Moreover, my wife, who is a nurse, has never heard of "bagel injury."
People should be careful with knives, but this is not the most serious risk modern people face. Living near cars is like 3+ orders of magnitude more dangerous.