Can one have too much knowledge?

Not all investors require the same level of detail when looking to invest in a particular product. Many are happy to look at a headline rate, for example, whilst others feel the need to fully understand the workings and mechanics of a product before committing their money. I suspect the majority sit firmly in the latter camp and, up until very recently, advisers did too. So why, over the last 6 months or so, does there appear to have been an increased need for a detailed knowledge of how a particular structured product works in order to deliver the benefits to a client? The financial cr...