Regardless of the stage in your writing life my answer is a resounding YES!
There are many reasons to attend such an event. These motives are different for each writer, and change from year to year and conference to conference.
No one conference is the same as another. While the format may be the same the material and presentation will differ, just like each book has its own voice even if the topic is the same. You may find one year you learn more than another year or that the conference on the east coast of the United States has a different feel than one in Ohio, California, or Alaska. Additionally, different groups focus on varying topics or genres. Don’t stop at one conference, try many.