You are completely right, and hours spent (in class) is how say US Foreign Service measures how quickly you get somewhat competent in a given language. There’s

You are completely right, and hours spent (in class) is how say US Foreign Service measures how quickly you get somewhat competent in a given language. There’s a lot of hoopla about just immersing yourself to the language and so on, but for most people achieving B1 means going to classes several hours every week for quite awhile.