Exactly, there is hundreds of millions of Android based devices out there. Some are plug and forget devices like TV sticks, kids tablets, set-top boxes and random home devices. Many may be old versions of Android so whilst the rather long list of vulnerabilities may be accurate, how many are for old versions that are no longer supported, but included as the OS is still in use? Many Android users also root their devices so that suddenly opens the floodgates to security issues, many will be a non-issue on standard locked-down hardware.