I once heard a British historian argue that tea helped Britain develop an Empire because more of the working class 'cannon fodder' were not plagued by many of the illnesses borne in the contaminated water supplies found in industrial cities.
The regular boiling of water for tea meant the British didn't have to rely on alcoholic drinks like beer for the safe consumption of water, which made fighting soldiers more efficient and less plagued by hangovers than their enemies. So, to answer the question, we reach for tea because it is part of a tradition that quite literally made people feel better in the 18th and 19th Centuries.
Personally, I think the historian was stretching his argument quite considerably, but it did get the students thinking beyond the obvious reasons for British military success.
Wasn't it the Spanish wife of Charles II (Catherine of Braganza?), who started the English infatuation with tea?