You do not need to attend. All hearing notices state the defendant must attend, even if attendance is not required when a person has an attorney for a traffic infraction. It is a liability reason for the court because clerks produces hearing notices for thousands of cases a year.
Standard language erring on the side of caution ensures there are no notice mistakes in the cases attendance by the defendant at a hearing is mandatory ie. Criminal cases or a select few circumstances with severe traffic infractions.
