We know that immigrants from francophone countries, such as France and Belgium, choose to put their children in the anglophone education system because they believe their children won't become bilingual if they put them in the francophone system, whereas bilingualism is the reason why they've come to New Brunswick, the only bilingual province.
And yet you can catch English like you can catch a cold in New Brunswick. There isn't necessarily any fear in that regard, but they don't know that and they make that choice.