Quote from Ghost of Cutten:
We've been through this before - bubbles have a very high likelihood of crashing within 1-3 years of the parabolic blowoff portion. Normal markets are far less likely to experience a 50% downmove over the same period. That information gives an edge to anyone trying to make money trading a market, because long gamma and downside-biased trading approaches will have a far higher than normal return when the bubble crashes.
From an investment perspective, long-term returns from investments made at bubble valuations are historically very poor and often negative. Therefore knowing it's a bubble helps you avoid making poor long-term investment decisions, thus boosting long-term returns and reducing risk.
Paulson's investigation into whether housing was a bubble was worth approximately $15 billion. Maybe you should write to him and tell him it was a waste of time?
If you think avoiding losses, reducing risk, and increasing profits don't matter, then that's your prerogative, but there is no point in continually interrupting discussions on the subject to ask why other people don't share your views.