Because Word itself provides thousands of features. One of the SmartArt can be used to make simple mind maps. And WordNote inherited that advantage.

This article describes how to use the bullet list to quickly generate a mind map.

In Windows 10, provide snipping tool. This article describes how to use the snipping tool of Windows 10 to take a screenshot to WordNote.

Sometimes, dragging a picture from Windows Explorer, or copying and pasting a picture into WordNote, the picture's original size is too large. Not very convenient to browse, nor suitable for printing.
 
So, WordNote provides a "A4 Image" feature that reduces all the pictures in the page to fit the A4 paper size with one click.

WordNote provides screen capture, cropping and graffiti.

WordNote can also add GIF animated images, while supporting display animations in the page.