Unions exist to make life on the job better for workers like you. Think about factory conditions, say, one hundred years ago. Think of them now.
People form unions for very practical reasons.
Each workplace, of course, is different. Increasingly, people are turning to unions because of threats to job security. Working with others, your voice will carry more weight. You will always have an ally in the workplace. The OLRA also spells out the rights and responsibilities of your union and your employer.