A successful content strategy should compel your audience to complete a form fill conversion indicating their immediate interest in your products or services.
There are numerous cross promotion opportunities derived from a form fill not to mention the seamless integration with your organizational CRM resource.
Contact forms should be tested for effectiveness simarliy to any a/b testing of ads. A high performing ad that does not convert a from fill can have be caused by a form that is too long, too short or simply too generic.