Germans are direct. They say what they mean. And they mean what they say. Germans don’t use euphemisms to soften a message. They use unambiguous language and get to the point. For Germans direct communication is honest, transparent, efficient.
Americans approach sensitive topics cautiously. Euphemisms communicate uncomfortable messages. Ambiguity can be helpful. Depending on the topic, Americans will address it indirectly. Indirect communication is considered to be both polite and effective.