Reasons: . It might offend someone. A beard is rarely seen in the US, though accepted in parts of Europe. You will not qualify for stage parts. ( talk about a hollow threat)
I have been complimented by neighbors, family, friends on covering my mug.
As for rare, surveys show 1/3 to 1/2 US men have facial hair. I did an informal survey at the mall, 7 of 10 had beards, and not just mustaches either.
If I shave it will offend neighbors, family, workmates, and me. Neatly trimmed,xtoo.