Science doesn’t “do” anything. It’s not an entity. People use the scientific method to investigate how the universe works. There aren’t really any alternatives.

Say you came across someone claiming that their tonic cured cancer. Why should you trust them? Well, there’s no other option than see if it works (or see if someone else you trust has already done so, preferably with a peer-reviewed, double-blind study and all that). Now you’re using the scientific method.

I mean, I guess you’ve got other options. You can blindly trust them. You can pray to the deity of your choice. You can cast snake bones and interpret how they land. None of these provide actual knowledge though. They’re all just guesses until you try it out, at which point you’re again using the scientific method. That’s why there’s no alternative. If you disagree that those options are just guesses, then prove it. Guess what? You’ll be proving it with the scientific method.

It’s like “alternative medicine”. There’s no such thing. If something works, it’s medicine. If it doesn’t, it’s not.