Siri on the Touch Bar can get in the way if you have the habit of hitting the edge of the Touch Bar. It can be annoying if Siri is turned on accidentally.
If you do not use Siri on a regular basis, you can remove it from the Touch Bar. Go to System Preferences > Keyboard. Click on “Customise Control Strip”. The Mac is now treating the Touch Bar as an external display where you can move your cursor into. Use the trackpad or mouse to drag the Siri icon on the Touch Bar out into the main screen.