we should find the balance between output and input. different people have own way to learn it. In my opinion, it is important for getting a ability of language  to practice it
. the learner of language need a environment where we can talk with each others. It can help remind the words we memorize. we always reminds that words we often use. 
i call it output. meanwhile,it is important for input.it is  the same important as output. when i claim down, read, write, correct the mistakes and make a conclusion. we Will improve ourselves to the new level. 
so I think output and input are the same important. the one help you use it fluently, and the other help you get new knowledge and grow up to new level.