Your wife is so naive. How can you use this absurd reason to hurt other people's health? You can't catch a man in this way. Husband and wife should trust and respect each other. You should talk to her. If she can realize her mistake and promise not to make it again, you can give her a chance or get a divorce.
Men don't have to care too much about their appearance. The scar will slowly disappear.
In fact, there are many ways to express love, but it must not be expressed in an extreme way that hurts the other party. Love is giving, not possessing.