By that reasoning, the selection criteria for newcomers to Quebec would be unconstitutional, just as would any form of asymmetry. Basically, between the weak and the strong, it is said that the law protects the weak. In practice, the two languages do not have equal status. The law is used to establish this equality of status to promote French as a common language in Quebec. The Constitution recognizes that the situation of French deserves and justifies legislative measures to protect it and ensure its development throughout Canada.
On November 29th, 2018. See this statement in context.