first,the main purpose of learning English is communication,and talking is the most direct and common way of communicating;
second,oral English is more easily to handle with for a beginer who is also desperately longing for experiencing a different culture.he will accept the idea of a foreigner quickly and conveniently.
third,when words combine with motion and emotion will make your expression perfection.oral english together with your body language will express your idea more accurately and lively.