There are many reasons why you should create a music visualizer for your music. The most obvious ones are that you can visualize your music and transform your audio into videos. This makes your content available on so many more platforms. You're not bound by audio only platforms, submit it to video only platforms and get more reach.
Video content is more engaging and memorable. People skip a lot of content when browsing social media. You only have a few seconds to grab the attention of your audience. An image can only do limited things. And when you add too much information to an image, it can put people off. A video shows your audience that there is more, so they should hold on and don't scroll any further. You can tell a story, engage and call them to action.
Music visualizers increase the accessibility of your content. I learned through the NIH that one in eight people in the United States has hearing loss in both ears. I know, it's shocking. I assume you want your content to be heard by as many people as possible. Increase your reach by applying this method. Enhance the musical experience for the hard of hearing and deaf.