Because it's blurry, slow and ugly
How to remove the 'News & Interests' widget from the taskbar (Windows 10 21H2)
The News & Interests widget (also called the News & Weather widget) in Windows 10 lets you check the current weather with a quick glance at the taskbar. It also shows additional weather-related information and tailored news updates when you hover over the widget icon. But while the News & Interests widget is a decent concept, it’s poorly executed with terrible design choices.
For starters, not only does the text on the News & Interests widget look blurry on most displays, but the various “cards” within it are slow to load and responsive. It also opens everything in Microsoft Edge, even if you have another browser set as your default on your PC.
If you like to keep things minimalistic and hate the blurry text or intrusive news feed, you can remove the News & Interests widget from the Windows 10 taskbar altogether. You can also choose to make it more bearable by customizing it.