> at the same time it removes the need for critical thinking while giving the best and easiest option for a solution in the first square.

It also makes it a little fun so people might actually pay attention.

Not everyone responds best to a concise abstract rule given in a Ben Stein voice.

AND teaches you all the cool names for facial hair! :)

It's only the best and easiest option as long as what you consider your beard style to be is actually aligning with what that diagram shows. When does a walrus moustache become a horseshoe? When does a villain moustache become a dali? That diagram tries to deliver its message by using ambiguous terms instead of fixating on the actual problem (which is to prevent your beard crossing the seal).

I find “facial hair shouldn’t touch the seal” to be much easier to remember than

“here are 45 different facial hair styles, some of them are good for respirators, some of them are bad.”

the latter takes much more critical thinking for me than “if the seal is on facial hair then it isn’t sealed at all!”

now off to clean-shave my stubble (but keep my soul patch)