The reality clashes with your idealism. The kids I’m talking about have very little/no academic support at home, so every hour you spend on foreign language learning in the classroom takes away from very valuable time that can be spent on English instruction, or math, or science, or…
Again, the kids whose parents value education and who can work with their kids at home can do well learning other languages, but there are far too many kids who are already slipping through the cracks, and taking away even more time from academic instruction (or English language instruction) really hampers their ability to compete with their peers.