Hi Grant,

This will be possible but require a small extra plugin that provides this functionality, let me describe the steps to do this.

1. Go the Plugins -> Add New

2. Install and activate the Content Blocks (Custom Post Widget) plugin

3. Go to Settings -> Page Builder -> General (horizontal tab)

4. At the "Post Types" setting check "Content Blocks" and save the settings

5. Go to the "Content Blocks" tab and create a new post with the "SiteOrigin Page Builder"

6. Create the grid with all therapists and save the post

7. Navigate to your home and/or about page

8. Add the "Content Block" widget 

9. Select the block to display 

10. And make sure to check the checkbox of the "Do not apply content filters" option

Now you can globally add/edit the therapists under the Content Block admin tab.

You're welcome.

If you have any other questions feel free to ask.