If I were a rich man, or had inherited huge fortune, I would have not learned English, and I would have hired a handsome interpreter serving me anytime.
If I were born in America or British, or I had immigrated to a English language country since child, I would have not needed learn English.
If I had been living in a quiet small village, which means, There were no need to speak English with others, I would have not learned English.
However, I am not RICH enough, and I was born in Shanghai, an international city. I have to get this fundamental skill for living in the cruel society, for competing with others in the brutal workplace.