The Hofbräuhaus am Platzl, Munich's famous “hofbrauhaus” was founded in 1589 by the Duke of Bavaria, Wilhelm V. It is one of Munich's oldest beer halls. It was originally founded as the brewery to the old Royal Residence, which at that time was situated just around the corner from where the beer hall stands today. The beer quickly became world famous thanks to the first brewer, Heimeran Pongratz, and the famous "Bavarian Beer Purity Law" of 1516 that stated that only natural ingredients could be used in the brewing process. In fact, the beer became so famous that it once saved the city from annihilation. When King Gustavus Adolphus of Sweden invaded Bavaria during the Thirty Years' War in 1632, he threatened to sack and burn the entire city of Munich. He agreed to leave the city in peace if the citizens surrendered some hostages, and 600,000 barrels of Hofbräuhaus beer.
The number one reason is craft beer tastes better than the "beer water" that is mass produced and mass marketed by the big beer companies. Craft beer tastes better because craft brewers spend their time focusing the quality of their beer rather than focusing on their marketing campaigns and stock prices.
Oh yeah! Craft beers can pack a punch. Most craft beers range from 5-10% ABV, but some can reach 20%, 30%, and even 40% ABV.