Professionals want leads. Most professionals have a web site and want leads or sales from that site. Many professionals have limited content on their web site but blog dozens to hundreds of blog posts. Much time spent writing can be used to move both causes. It is not recommended to duplicate content. However, changes in the content can make it reusable on your site to boost the site's value.
As much time can be spent on writing about the area you service along with current issues there. Post those topics to your site and then blog about the issue. You will find search engines will find your content sooner and your pages more often.