I was the same way. IMO, philosophy is WAY underrated. If the takeaway from intro to philosophy courses is ancient Greeks had some strange ideas about atoms and such, that is missing the point. Below is for anyone that has never touched philosophy at all.

Ethics is NOT what the corporate ethics things say about following the rules. Ethics in this context would raise the question of whether always following company rules is the right thing to do? Is right and wrong objective or subjective? Is something right in some contexts but wrong in others? Which system of thought should you be using (consequentialism, virtue, deontological)? I was just following orders when I murdered those people! By our laws it was legal, therefore right! It is a great way to persuade people and make decisions.

Epistemology is absolutely key to critical thinking. How do you determine what you know vs what you merely believe? Can you trust that error message is accurate? Can you trust your memory? Personal experience? It is a great way to build a world class bullshit detector.

Metaphysics gets you to think about things at a more foundational level. Think about a stop sign. Is it a red octogon with stop in white letters? Not everywhere. It could be a cop or crossing guard with their hand out. It could be a red light. It could be a red sign that isn't an octogon at all. It is a great way to learn to challenge your assumptions about the nature of the world and things.