Yes, often people need to learn through pain how to be a good person. It can be someone who bullied others in school and later realized how much pain they caused and feel severely ashamed by it.
I don’t know about the concept of pure, I don’t think in those terms myself. But we should aspire to make a positive difference in this world. Every time you meet a person, you affect how he or she feels.
It’s not hard to be a good driver. You can even drive fast. Just blink several seconds before you change lanes, keep a lot of space between you and the car in front, and just don’t surprise other drivers in any way.
This includes not breaking hard unless you have to (only when you fail to have enough space in front of you to brake smoothly).