Why isn't there an elemental druid?

There's a whole bunch of flavor text talking about druid's connection to the elements, but there aren't any elemental druids. What's up with that? like, sorcerer at least has draconic heritage which can be reflavored to elemental, but druid doesn't have anything. The closest it comes is with moon druid's ability to turn into elementals at level 10, but it doesnt have anything for an entire subclass that uses the 4 elements. Is there a reason for Wizards of the Coast to do this or am i looking way too much into this?