You’re guilty of the offence. You know you are guilty of the offence, but you also know that this is just a traffic ticket and it won’t have any real long term impact on your life. If what you want to do is pay your fine, plead not guilty and go about your business, then getting legal representation for driving offences may be unnecessary or even counter-productive.
However there are some situations where having an experienced criminal lawyer will make all the difference in whether they get convicted or not! If what they are being accused of could result in significant penalties or jail time if found guilty, then hiring a lawyer can really help with their case!