I'll agree with the post in a limited sense.
You need simulated papertrading in order to determine that your strategy and edge is truly workable. All starting out traders will bounce between strategies and nifty indicators like wide-eyed children following the bright, bouncing bauble, desperately searching for that Holy Grail. Papertrading and backtesting would definitely be necessary in order to determine that what you have is the real deal, taking into mind that simulations can never truly capture the real life ebb and flow of slippage.
However, simulation and papertrading can never be used to conquer the emotional aspect of trading. If there are so many strategies that are backtested to be shown as profitable, why than are the VAST MAJORITY of traders unprofitable? Even profitable traders have only a 20% chance to have one profitable year out of four and that percentage drops to 2% to be CONSISTENTLY profitable year in and year out.
It's the hard grind, the mental and emotional stress of being in the breach, weaving in and out of the market like you've got a 250lb man-killing linebacker on your ass that wants nothing more in the world to maim your sorry pathetic ass. Every day is an adrenaline rush, every day you get battle scars, every day you experience the highs and lows of euphoria and depression. Every time you step into that gladitorial arena of the markets, its like being in the Super Bowl every day. What a F$CKING rush that is.
No amount of simulation and papertrading, no matter how good the strategy, will turn you into that calloused, emotionally dead, and profitable market mercenary. Look around, pansies, at your fellow forum members. It's nothing but scared, dumb newbies on market Ecstasy. 9 out of 10 of you won't be here next year. And its not because they didn't have a good strategy or setup, it's because they couldn't get discipline and control their emotions.