I don't think it's my place to answer that question, apart from the legal aspect.
As I have already pointed out, section 20 of the Charter provides for services to be offered and communications to be available, that is, the opportunity to communicate in French and English, based on the criteria established by the constitution. Part IV of the act as a whole is about implementing this, for both anglophones and francophones, for both majority communities and minority communities.
The question is maybe not whether it is harmful, but whether it is relevant in the context of Part IV.