It's really about insight, understanding and repeatability.
A lot of the problem I'm noticing already, moving from a flat neophyte into the intermediate area, is that once you start to "see" more of an Asset class, the harder it is to filter out details.
I was explaining this to someone via art the other day. Someone that looks at a painting will have, at the basic view, one of 3 opinions: "I Like It", "I Don't Like It" or "I Don't Care". The problem becomes if you "Like" art and start moving further into the area, you'll be completely confused by evaluations and why certain pieces are worth millions but really don't "look" very good. It takes a long while (and a lot of work, which is why poseurs are so irritating) to understand where the "quality" of certain art pieces resides. Why certain aspects always are important, how playing with those aspects have generated entire artistic careers and what the technical skill sets take going into each piece.
The intermediate step is where even most Art Collectors never get past. Whether for a lack of time put in or their own misplaced ego (sound familiar?), it's hard to move beyond the middle. Until you do, however, it won't profit you much. You'll make a lot of mistakes and get hung up on things you shouldn't. You'll make arguments that are about pride and nothing more than your own short-comings.
Once, however, you make the "expert" area, you'll understand what you can & can't do, how to handle other aspects and how not to destroy yourself in the process. This is where a Trader *has* to get to. The ability to stay within yourself and *master* the skills you need.
This is why ICT made the "Sniper" series. If you can nail 1 trade for 240ish pips per month, when it's clear as day (for you) what will happen, and you can hit those every time they show up (maybe run 3 pairs total), you won't just make a career there. You'll make a fortune, it will just take about 5 years. That's just 1 leg of a 2-week price move in any major pair. But you have to go through the "middle stage" to get to the point to trade within yourself.
This is why there's so many failed Traders and failed Artists. They couldn't work "within" themselves, and, as a result, they have to blame others for their own inability to perform. And, a lot of the times, it's a matter of not being in the right area, rather than having the proper talent. Attempting to be what you are Not normally ends badly.