This isnt a problem just with Karate, but with Many TMA. TKD for example. What I offer is this. At some point, if you are serious about MA, then you have to take an objective look at what your doing and decide if it is appropriate for your needs. If your needs are self defense, and you have looked at your style without bias, and you still practice this way, well then you probably were never gonna be the next chuck norris anyways.
"When I let Go of who I am, I become who I might be."
Lao Tzu