Does smokin weed really make you this dumb?

Reminds me of some one I know,the guy has been out of work.Has no desire to work.His exwife whom which he still lives with takes care of both him and there two children and his exstepson.So for the longest time he stayed home with the kids and smoked dope with kids around until he had no desire to do anything.Well after two years he finally caves in and gets a life and joins the work force.So now that he's working he gets pissed because his 19 year old exstepson just wants to lay around and yeaup you guessed it smoke dope and not work.So the way I see it you smoke it in front of your kids than yes they will probably do the same when they get older.A family that smokes together lays around together.