Complex sentence: It doesn't mean that data visualization needs to look boring to be functional or extremely sophisticated to loviding insights into a rather sparse and complex data set by communicating its key-aspects in a more intuitive way.
Split into simpler sentences: It doesn't mean that data visualization needs to look boring to be functional or extremely sophisticated to look beautiful. To convey ideas effectively, both aesthetic form and functionality need to go hand in hand, providing insights into a rather sparse and complex data set by communicating its key-aspects in a more intuitive way.