Science is most assuredly about why. Why do stars go supernova? How and why are inseparable. In the case of certain branches of pseudoscience, asking why, how, or even what gets you blacklisted because those questions are a threat.
No, science is not about why. You’ll recall I said ‘why’ allows for the premise smuggling of intent. And intent means consciousness. And consciousness means God. It’s a creationist trope