Deformed jaws are another one.

Vasectomies are meant to be permanent. Even if you get your vasectomy reversed, your fertility may never come back. Vasectomy reversal surgery is complicated and expensive, and doesn’t always work. So you should only get a vasectomy if you’re totally certain you don’t want to get someone pregnant for the rest of your life." - Planned Parenthood

Literally a five second google search will debunk your own point