No,
Its mainly a matter of lasting long enough to learn the profession. Clearly some people have the knack for it, and some do not. Most traders try to train themselves, and simply run out of money before they become halfway consistent. Even with training, it takes awhile to learn, sometimes years, just as any other difficult profession would.
Trading does go contrary to human instinct however, so given a hunk of money with no knowledge, I'd say your 99% number is about correct.
Given training and adequate capital, I'd put the numbers closer to 50%. How many people here do you think have this? Not many. How many Goldy trainees succeed? Just about all of em. They can go home and trade from their bedroom, and they'd still make money.