I can't articulate any further reasons than have already been expressed. I can reiterate my view that there wouldn't be any legal impediment if this amendment were adopted. I can't conceive what legal argument tobacco could bring to court.
Would they challenge this bill on the grounds that they've been exempted because of the schedule? If at a certain point regulations were adopted to say that part of the act would apply to tobacco, of course the government would have to ensure that any such regulations were consistent with the Charter of Rights and Freedoms. But to simply have the amendment made at this stage, there should be no impediment.