My students sometimes ask why they should memorise things in the age of Google and LLMs. But internalised facts are your bullshit filters and your raw material for creative association. Facts outside your head are inert.
Universalisability usually comes up in ethics (“what if everyone did this?”), but it works pragmatically within a single life too. Before you text at the wheel or ride without a helmet, ask if you could rationally endorse such a policy for all similar moments. Almost always no!