We have no idea what Canada would look like today if it had been operating under a different democratic system.  It's possible it would be an even better place to live, it's possible that Canada is as great a country as it is today not because of FPTP, but despite it.  So there's no point in second guessing things in this way.  

What we do know, however, is that PR produces a more democratic result, one that better reflects the political wishes of the nation's citizenry.  There's no doubt about that.