Y’know, if the YouTube algorithm is any sort of sample, a whole damn lot of the 2A Bros and “alphamales” and “protector warrior poet” and “sigma” macho types out there ARE a bunch of “beardos”.
Right, the hood over the top of the head was to protect from contact contamination but the air seal was around the exposed forehead.
As others have said, modern protective gear can handle a certain level of neatly trimmed facial hair. (But TBF knowing people I am not hopeful a large part of the formation will be wearing it right anyway .)