The problem is, the pool for recruiting foreign students is not as big for French-speaking countries. The countries in which francophone establishments can recruit francophone students are often less affluent countries where students have little financial means.
The whole issue of financial self-sufficiency is becoming a problem, because those students may not have the $10,000 on hand right away, but their extended family, the aunts and uncles, will chip in to fund the student who is going to study in Canada. Plus, the student can work while they study. People often forget that.