It's quite interesting to know that "you like English because you don't know it". Does that mean the reason that you like English is because you don't know it? If you know it more, you will not like it anymore? Or you meant something else......
Whether English is important to our living or not, it will depend where you are, what you do, what environment that you are in. If you are a student, you know how important it is to you. It's a subject that you need to study and get a good grade/score in order for you to get into an university. If you are working in a foreign company or in a company where you have to deal with client in English, you need to have good English to communicate with them. If you are living in a country which people speak English, you need to know English for you to find jobs and survive. If you are living in China and you have not thing relate to English, then you don't need to know English. So.....it depends!