There are still some elements of the software installed and running in the background
Before you proceed, make a Time Machine Backup
Do not attempted below until the backup has been successfully completed
If you have removes the Wacom application you will need to manually remove the left-overs
Most of what follows will be done in the Terminal Application
If you are not familiar with or comfortable using the unforgiving Terminal application
Do Not Proceed
To Unload the launch daemons
Open Terminal and run
sudo launchctl bootout system /Library/LaunchDaemons/com.wacom.*
You will need to enter your password
To Delete Wacom launch daemon files and still in the Terminal application
sudo rm -f /Library/LaunchDaemons/com.wacom.*
To Remove privileged helper tools
These are exactly what your Etrecheck is listing
Again, while in the Terminal application
sudo rm -rf /Library/PrivilegedHelperTools/com.wacom.*
To Remove the main app + driver
Terminal command below
sudo rm -rf "/Applications/Wacom Tablet.localized"
Remove support files which is recommended
sudo rm -rf /Library/Application\ Support/Tablet
sudo rm -rf /Library/Application\ Support/Wacom
rm -rf ~/Library/Application\ Support/Wacom
rm -rf ~/Library/Preferences/com.wacom.*
Restart your Mac to fully clear loaded services.
Verify everything is gone
launchctl list | grep -i wacom
If nothing shows, you are good to go