Yes, I have had that experience. However, the government must be made to understand that these are two different situations. In your case, 80% of your students do not speak the language of the school when they start kindergarten. In the anglophone schools' case, students starting kindergarten already speak the language of the school. So it is not the same thing, as you said.
This may be a case to be put to the courts, like the 2020 example you mentioned. That is another avenue to explore.
Having said that—