practical? yes, defensive? yes
why you ask?
two barrels is better then one. how many times have you been out target shooting with your pump or auto, and it jams on ya, and you know yourself. those jams take minutes to clear.
so with that double, ideally not a " recoil resetting the trigger for a follow up shot" you still have a functioning weapon. not very fast but still a weapon.
besides how many times in korea did those short little guys named charlie kick our semi and full auto armed butts while armed with bolt action rifles?