Right. I can see your point, it kind of all depends on the context with which you are using the term "enlightenment".
All throughout time, all of the different spiritual traditions all point to one common experience, one common realization that is known as enlightenment, realization of the true nature of reality, etc. Buddhism, Yoga, Vedanta, Zen, Taoism, other mystical paths... they all have one particular common experience that is known as enlightenment that is the goal of each of their paths and practices.
However the word enlightenment can be thought of in different ways... such as you can be "enlightened" about a topic you never knew, or enlightened about the inner workings of your mind, etc. Somewhat like a lasting epiphany. But in this context I am using it to refer to the universal experience which all spiritual traditions point to as enlightenment.
I don't understand joe Rogan.
What's to understand or not understand? He's just a dude like the rest of us lol. The main guy talking here in Sam Harris btw.