Hypocrisy of Anti-virus Software Vendors

After using McAfee's VirusScan product for the consumer market for a while, I still get very annoyed that it can only update itself if you're logged on as administrator. Given that running as a normal user is one of the better security measures to take, this seems plain hypocrisy to me: "Please use the most unsecure user account possible to keep your PC protected..." Especially because the business version of VirusScan does update itself without any need for admin logons. And it's not just McAfee. The story is the same for CA's e-Trust and Norton's consumer offering.