Poll: Is Prudent Risk Management the only true edge in trading?
Answer: No
Maybe if the question was phrased somewhat differently, I would've answered Yes. But it wasn't.
I'm not so sure I even agree it's an edge in itself. Because no risk management can force price to go in your favour in the expected way, there should be no expectations of profits from risk management alone.
Aside from that:
Risk management and, often unmentioned / too often forgotten, position sizing, are powerful tools for proper capital preservation. Doing these two right should protect against most damaging losses, long enough for having realistic chances to exploit incoming profit opportunities. In this way, winners are not really "expected" or in any way predicted, but a possible by-product of sound risk management by weeding out the painful losses.
It's a beautiful concept, but how can you say it's the only edge possible? Maybe it is for you, but so what?
As for having stop-loss at break-even or not, isn't such a hard rule a form of bias? Does the market care either way? Also, having stop-loss always beyond "noise" seem to enforce even more limiting assumptions. Imagining all the possible trading plans, having break-even SL might be defended with the argument that the time- (cost) and price- (risk) differences have at that point become equalized, or something entirely different, ie hedges or other combinations.
Managing risk and positions are crucial. How anyone does it is not as important as the possibility for consistent results though. If all you have is a hammer... and all that. Declarations of the One True Way (tm) to do anything, usually falls on deaf ears, and is often not the best medicine for curing intellectual laziness either. I do agree that sound risk management is very helpful and should be provided for dilligently for those who seek some security and possible consistency in their trading. As is often said, but it's also true: Trading should be boring. At least if the goal is along the lines of consistency.