What is the definition of “ruach hakodesh (henceforth RH)”? It is impossible to discuss any inyan without precise definition. If RH is defined as “Divine inspiration” then it is clear that anyone, even non-Jews, can experience it.
If RH is sort of semi-nevuah, I would say that any Jew with the proper Kavanahs and preparations could experience it.
The Rebono Shel Olam can speak to all of his people, not just the “elites”