To think deeply; How, Why and What

I feel like many people are good at asking HOW questions.

How to make money?

How to learn a new language?

How to get married?

Then, we ask WHY?

Why do I need money?

Why do I have to learn a new language?

Why marry?

But to think deeply, I think we need more WHAT questions.

What is money?

What is language?

What is marriage?