Sure, let's ban this symbol of oppression; for the women who wear it by choice, they can decide not to wear it, no problem. Or if they decide.to stay home, well I might think that's dumb ... but their choice.
But what are you going to do about the women whose family says ... No burka, no leaving the house?
One of the most effective methods an abuser has to control his victim is to isolate her. Isolating her keeps her from seeking help and this would be even more effective for a woman who is not familiar with Canadian culture. With a burka ban, the woman most in need of exposure to Canadian culture, its freedoms and its resources are denied that if they can't leave their house.
People who think banning the burka is helping oppressed women fail to realize they are simply adding another layer of oppression. Banning the burka will just make the most oppressed women invisible and quite literally trapped at home. But I suppose banning a "symbol" of oppression is easy and when all the burkas disappear, along with the women who wear them, people can tell themselves they've accomplished something.