If one has the proper knowledge about trading I don't think that person will experience the shit trading put some of us through. Trading isn't complicated as we profess it to be, it's just a game were you know and practice the rules that follow and having your edge.
Why trading get to ruin most person,it also elevate most people,why; because the later know and have a skillful knowledge of what the other don't know.
Even though one has a proper knowledge in trading, shit won't still be avoided sometimes. It's either about the unpredictable market or there are factors that affects us personally. Indeed that if trading can ruin someone, it also elevates someone, so we shouldn't be biased and say that one must avoid trading.