It's relative. 3 or 4 years may not seem like alot in the face of a lifetime. One an argue that most of those people in the eastern civilizations are still part of the illusionary belief and Ego driven views, just presented as a form of Enlightenment.
It can seem like a huge amount of dedication to something you're taking on faith is possible. But my point was if we've never met a person that has reached these higher levels of Enlightenment and Truth. Not a spiritual person who is still Ego, just successful at looking like they are enlightenment, but full on what is taught by Leo. Is taking on faith that it's possible, is that enough to dedicate that 3 to 4 years to maybe some slim possible of getting there. For me at least, I'd need more than that faith to even dedicate myself down this path.