I completely agree with you, it’s a bunch of BS.
However, if it helps you feel better you can look up diffuse reflection eye danger (such as with wood) and you will find that even unprotected (no enclosure) diffuse reflections will only cause eye damage if you stare at the spot for extended time.
Look at the class IV eye hazard for diffuse reflection.
https://www.lasersafetyfacts.com/laserclasses.html