A lack of intent doesn't make it an accident. It's called negligence. What's more, there is a difference between sole negligence and gross negligence. Sole negligence is just carelessness or inattentiveness. Gross negligence is a reckless or deliberate disregard for the reasonable treatment or safety of others. The collision doesn't have to be intentional for the disregard of reasonable treatment and safety of others to be deliberate. A person doesn't just inadvertently make the string of bad decisions to get drunk, drive, flee the scene of a crash where someone was injured, and then lie about it when questioned. Those things were all deliberate.