>> Good advisors too don't know what will happen, and tend to get into the herd >> mentality, the crowd, the loss aversion and all those little behavioural >> biases that screw up our investments.
This is a bit like saying "good surgeons will leave their scalpels in your chest and stitch you up." You are describing terrible advisors here, not good ones. A good advisor should not only NOT be subject to the crowd and herd mentality, but also help you protect yourself from these as well as the greed vs. fear pendulum swings that cause behavioural biases. An asset allocation driven approach to portfolio management will easily achieve this.
