It's just extreme levels of ass-covering. If you have 3 security solutions installed and get pwned, oh well, it's not your fault. If you had none and get pwned

It's just extreme levels of ass-covering. If you have 3 security solutions installed and get pwned, oh well, it's not your fault. If you had none and get pwned, you get the blame, even if the attack vector wouldn't have been protected by most security solutions.