To me, your literal argument doesn't make sense. It's like saying "ThrustSCC isn't the fastest car, because I can't use it as I don't have one." Immersion might

To me, your literal argument doesn't make sense. It's like saying "ThrustSCC isn't the fastest car, because I can't use it as I don't have one." Immersion might not be a method that you want to use, but I bet that also introverts learn faster when they (accidentally) end up immersed than by any other method. Plus, there are schools that use this method, so you could avoid social interaction except with a handful of teachers. Pretty expensive, though. However, immersion is often not available. When you want to study a language before going on a trip, you often can't find a suitable class, let alone a socio-cultural environment for that language. It might also be financially prohitive. Then you move on to the next best method.