Knowledge you gained from attending class is entirely different from the experienced you acquired. Though it may be useful but at some point in time it is not an answer to your need.
Especially if you are involved in a certain case where technically and legally need an expert opinion and ideas. Always remember that your past can never be your future.
A DUI class requires time and money. But as you pay more you gained more from every detail that you will learn out of attending this class. It will be your tool for anticipating and solving problems in case when you will be charged with DUI offenses. Yes, it is true that even you did not go through with DUI classes you can still face the charges filed against you.
However, the situation will not just end there. You still have to attend trial proceedings and if found guilty either you will be fined excessively based on the gravity of the crime you committed or be put on jail. So what are you going to do then? You can no longer defend yourself alone. You need a legal advice and you need to be released immediately.
Otherwise, it will entirely ruin your life.
Having a larger perspective in life creates enough understanding of every situation. So you have to choose either to attend DUI classes to prevent you from committing frequent DUI violation or to subject yourself for the same and be on jail for several times.