Professional poker players are more dedicated and well-focused on the game or should we say that they have an advantage when it comes to experience. Anyone could play poker but not anyone could be professional in it. It needs a further understanding of how to deal with the risks of this game and having a sense of responsibility at the same time. People prefer poker over other gambling games because its risk is more manageable than others.
When they want to learn to be a professional poker player, they must spend more time learning various poker lessons and how to control themselves. Becoming a professional poker player means that they can also earn money from the game while continuing to learn. It is not easy because they should prepare many things before becoming a professional poker player, especially the time that must be spent to become a professional. But all gambling games have risks and the size of these risks varies depending on several things.
I think that they do get over the psicological aspects very early or else they simply have to abandon. Most professionals take the game level to a point that is pure mathematics. In the same interview, she explained that during the game she just thinks of the money on the table as "firing power" or "fuel left" to be burned and decissions are purely intelectual.