Because they were looking for a better life. In addition, the new colonies became trade connections, which enriched the Phoenician merchants. So the Phoenicians were able to found many new cities on the territory of Middle-earth, one of the most legendary of them was the city of Carthage, which later turned into a major commercial and political center of the whole state.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.