You need it. You need dialogue. Or don’t you? I come from a scriptwriting background making dialogue not that important unless it is. There is nothing set in stone on how much dialogue you need for your story. You have to figure it out on what your story needs. You can’t bombard an audience with a bunch of words that won’t make your story move forward, give you information about the story or characters.
So again where do you need a dialogue? Let say your scene has at least two people. And you have described everything you need to set up the scene but the action is not moving… then a dialogue can make the wheel go round again.
The other way you can go is that you don’t like describing that much, then you can use dialogue to describe what is happening. Now everything you put in the dialogue must be important. Do a character needs to tell something from the past because you don’t want to do a backstory but the other character needs to know something about the first? Then do the dialogue. Does talking too much reveals something about a character? Does he have a talking nervous breakdown? He needs to keep talking so he doesn’t forget things? Always ask you why you are putting a dialogue. Search for that meaning.
One clever thing to do when using dialogues is that you can foreshadow things in your story. You can tell that some characters were thinking stuff ahead of what is going to happen. There is a movie called The Prestige, which does it very well. It is about a magician rivalry that tries to trick you with its visual components and it is revealing everything in the dialogue.
The other thing you can combine with the dialogue is action. “I’ll do it!”, he said hesitantly. You could say the character is not sure that he wants to do it or he is scared. In this scenario, it works more for some writers because they infuse the dialogue with the part of the narrative so that the audience has more information on their grasp. That way a new form of giving the audience emotions is invoked, creating more ways to elevate or lower tension in the story.
So dialogue works. But it has to be done correctly. You need to make a point on why the dialogue is there. Is it revealing information about a character? The world? The villain? Is this dialogue creating friction or making something more at ease? Is the character saying sorry to another make the character change and thus creating an ally? Or what if by the character confessing his love win his love interest and actually conquering the main conflict?
So put the work. Do your research. And make awesome dialogues… when needed!