Newbies can understand many things with them even though these are no as we can face situations on real accounts but still good helpful things specially while newbies looking for understanding of risk management which is the most important thing for newbies those are entering into trading. Emotions are always important because if they are under control then things can take good changes while peoples are on loses because there are opportunities to change your loses into profit even these are usually taking too much time but still helpful for understanding trading strategy.
Beginner traders should indeed have time to go through learning, either through a demo account as an initial trial because it can also help themselves when using a full or real account. But what needs to be understood is that it can be done over time when the deepening of his knowledge is truly mature for himself. Because emotions in trading can arise along with greed so that there is no more wise consideration until you can experience losses in the end.