The reason this power is dangerous is in fact that it can be used to change the law, as you have said, change the Canadian telecommunications policy instead of taking the legislative route. Moreover, it amounts to interference in the decisions of a body that has been created and that is quasi-judicial, independent and impartial, and those decisions are changed. Why create such a tribunal and then use a power that is not transparent, that is subject to pressure from lobby groups, that depends on the minister's ideological vision, to change decisions, policies and orientations that have been arrived at through the legislative process, which is the public and transparent approach that enables every person, every Canadian, to express his or her views?
On February 21st, 2007. See this statement in context.