The goals are to understand how epistemology works, correct logical errors in the status quo, have a practical method for making decisions and judging ideas, be able to resolve conflicts between ideas without compromising (this includes both conflicts between alternative ideas and conflicts between an idea and a criticism of that idea), know how to learn effectively (including inventing new ideas, not just learning existing ideas), and know how to use mental resources efficiently. These skills are important to basically all the rest of your life. They’re general purpose issues like rationality and critical thinking that are used in every other field where ideas matter, which is all of them.
Rationality and critical thinking are also useful in cases where many people think they’re not useful like dealing with emotions.