Jim will explain that there comes a point when the whisky is in balance and needs to be bottled. This is the point at which the wood stops giving (complexity, flavour, etc) and starts taking (fruit, delicacy, freshness, etc).
"Older is always better" is a statement that any wine connoisseur would recognise as a fallacy. Any wine, even the greatest first growth Bordeaux, will reach a point in the bottle where it stops improving and starts a gradual decline to - frankly - vinegar. Unlike wine, spirits will stop ageing once bottled - so the decision that a given malt whisky has reached its peak lies with the distiller, not the consumer