Disease burden In the United States, sporadic cases of tetanus continue to occur. Since 2010, there have been less than 40 reported cases each year. Most cases are in people who either

Never received a tetanus vaccine Didn’t complete the tetanus primary vaccine series Didn't stay up to date with their 10-year booster shots

https://www.cdc.gov/tetanus/php/surveillance/index.html

So, sure, tell yourself "I don't need a tetanus shot. Nobody gets tetanus anymore."

They don't get it because they're immunized.

You do the math.