This 2001 New York Times article explains the importance of philosophy for each of us. After all, the object of philosophy is the logical clarification of thought. It should help inoculate people against false appeals and baseless assertions.
One of the best examples of philosophers engaging with non-philosophers is bioethics. It is not the only example Alfred North Whitehead famously engaged political questions of his day. And perhaps even Italian Renaissance philosophers got out and about, if Giorgione’s “Three Philosophers in a Landscape” is to be believed.