If this works so well, why hasn't it been done before?

I can anticipate what people will say about my language-learning technique

If this works so well, why hasn't it been done before?

I would only be able to point out that

Q&A why was this idea not come up with earlier (for language learning)? Cycle seats, people do without thinking. Fashion. Shaving. Brushing teeth. Immunizing their children.