High energies are necessary to break particles into their constituents due to the strong force that binds them together, which requires significant energy to overcome. This force is much stronger than electromagnetic interactions, making it challenging to separate particles without high-energy collisions. Additionally, observing fine structure involves probing the internal details of particles, which also demands high energy to resolve these features. The discussion emphasizes the relationship between energy levels and the ability to manipulate and observe fundamental particles. Understanding these principles is crucial for grasping advanced concepts in particle physics.