Why do some Lutheran churches have monasteries while others don't?

Several Lutheran church bodies, including some of the Lutheran churches in Germany and Scandinavia, have active monastic communities. However, other Lutheran churches, including ELCA and LCMS in America, have none. So, why do some Lutheran churches have monks while others don't? Is there a specific reason for this difference, or a rule prohibiting them in other Lutheran churches? If not, why don't those churches have monks?