ios – Storyboard would not include a view controller with identifier crash

extension UIViewController {
    static func instantiate() -> Self? {
        let identifier = String(describing: self)
        let identify = identifier.replacingOccurrences(of: "VC", with: "")
        let storyboard = UIStoryboard(identify: identify, bundle: Bundle.most important)
        return storyboard.instantiateViewController(identifier: identifier) as? Self
        ?? storyboard.instantiateInitialViewController() as? Self
    }
}

Runtime error:

Storyboard would not include a view controller with identifier

Why does it crash? Why do not simply silently return nil? Would not or not it’s extra intuitive, constant and handy method?
And the way am I purported to cope with this example now, to lively my aim?

Edit: In docs they are saying

If the desired identifier doesn’t exist within the storyboard file,
this technique raises an exception.

Then why is not this technique marked as “throws”? How am I purported to catch the exception from operate, which does not “throw”?