Use 'moralize' to show that you think an issue is not just important, but important in terms of right and wrong. She would often moralize about the school's disciplinary system.
Pro Tip 2/3
Negative Connotation
'Moralize' can have a negative feel, suggesting that someone is self-righteous or overly judgmental. He doesn't just give advice, he tends to moralize.
Pro Tip 3/3
Subjective Viewpoint
When people moralize, they express their own beliefs about what is morally good or bad. Journalists should report facts, not moralize about events.