Not catching bass is an integral part of the fishing. It adds mystery and intrigue and forces us to apply reasons as to why. This of course is normal and many of our derived reasons are probably very wide of the mark - but it makes us feel better if we apply our fishy logics and thoughts to our 'failures'.
What it doesnt mean is that we are bad fishermen or I am a bad guide, or you havent got the latest hottest thing or we are doing something wrong.
These are wild creatures living in the ocean, swimming free around an island influenced by many many things.
What it does mean is that the next time we catch them the more we appreciate what we really missed - the fish and the experience.