ORAL OR WRITTEN?

Languages of people have so many variations. They differ in many ways, they don't sound similarly, they are spelled differently and not all people understand one language. But why is language important? It is very factual that language is very useful when we communicate, when we establish conversations, when we express ourselves.
Once, I was asked, which do you prefer, oral language or written language? I was bit confused because I really like talking than writing because it has to be involved with much efforts and for thinking it well which is not really dominant in me. But I answered, written language. Why? Even I, have to ask myself why.
Everything in this world has negative and positive effects. When we compare written and oral, written can't be erased anymore especially when many have read it already and will be stock in their minds completely. Oral could be easily cleared out especially when a certain man is doing a speech and realizes at the later part then he will reason out immediately. I'm pointing out the certainty and I think the writer has the more of this. Even the writer prepares for his speech, he can easily change his plan, though 11th hour which could be very confusing at the end. Furthermore, in writing an article, the message is irremovable and the meaning lasts forever. In oral language, after you hear it, you can't ask that person to repeat because you forgot certain important points of the whole speech. There's even a possibility that the speaker could not recall it anymore. Another one, take a look of what our national hero has done why he is still present in every heart of a Filipino. His messages are still printed in our minds. He wrote his experiences and possible solutions which is also one reason why Filipinos fought with all their might. On the other hand, talking would become violent when someone contradicts on your statement strongly, then you exchange words with each other, eventually, F-words. Not like in writing, it's a peace- making way of two rivalries. There is no pressure and a lot of time is given for more reflections.
Lastly, if I would be neutral, I just hope that every message is good and could be used for everyone as a start to get improved.