People cut various things with their, 1095- rusting/patina covered, knife blade all day, add any oil to it, cut their food with it and this is done with minimal cleaning BUT, they worry that if they comb their hair or beard with a different tool on the knife their hair will contaminate the blade and poison them OR that the germs from the blade will jump onto their hair.
A victorinox can have scissors that can be used to cut hair or nails, a saw that can be used to cut wood, a screwdriver that can be used to screw in dirty greasy screws but people still use the blade for food without worrying about cross contamination.