Someone with the idea that they want to be just like one of those characters they see in a spectacular EVE video, or that they hear about in an EVE story, is like the kid seeing or reading about astronauts and thinking they want to be an astronaut. Except most people who grow up wanting to be astronauts never become astronauts, and same with any particular goal in EVE. And what happens in EVE stays in EVE. Even if you achieve something notable in EVE, something that requires a lot of effort... it's still in someone else's virtual universe sandbox that could be turned off or changed on their whim.
The chance that you'll ever be directly involved in corp- or alliance-level "big events", other than as cannon fodder, is almost zero unless you know ahead of time you have what it takes to join or build, and then run and manage that kind of enterprise at the equivalent of the c-suite level. Still, 99.99% of your time will be taken up with ordinary stuff. It's a job.