A guru is someone who exposes the darkness (Ego) in order to bring in the light (spiritual awareness.)
You are your own guru. We all have light, and dark, and have a spiritual mission to separate from Ego in order to cultivate a higher consciousness.
We do not need others to do this job. This is something that is inside of us (a return to the Divine).
However as we become more spiritual we gather tools and skill sets in order to cultivate this awareness from a plethora of places. Others can bring us more tools for more awareness, but we are the guru, the only one who can do the job.
Have you ever heard the expression “You can lead a horse to water but you can’t make it drink”?
WE have to do the work, WE have to be our gurus. We can serve by providing tools for empowerment but our students, our clients, have to do the action of exposing the dark to become the light.