The German beers deserve their reputation as among the world's finest. With Reinheitsgebot, there are no additives. They've been doing it right for hundreds of years! Pilsener is more to my tastes.
For me, the best brewing countries would go 1. USA 2. Belgium 3. Germany. Maybe Britain over Germany as well. SOme really good british brewers. The Reinheitsgebot has one advantage and it stops the adjunct lagers that populate the US shelfs. But it also eliminates creativity. For example, rye beers, one of my favorite, are banned under the Reinheitsgebot. The entire purpose of the Reinheitsgebot wasn't purity, but to have brewers avoid using grains made in bread like wheat and rye.
Water, barley, hops and yeast all make for fine beers, most of the beer I like is brewed that way. But if I want a belgian triple or quad which has candi sugar in it. Not an option in germany. If I want a blueberry lager, not an option, if it's Halloween and I want some Punkin, not an option.
Also it's fair to note, the USA brewers have mastered the German styles. Run through beer advocate. The Bros ratings on all german styles. You find a US brewery at the top alone or tied. For example, in the Dortmunder, Great Lakes Edmund FItzgerald topped Ayinger's best offering. In Eisbock Kuhnhenn topped Schneider, In the german pilsner category 3 US breweries earned a 100, 0 german breweries did (Norway and Netherlands did though) In the Kellerbier, top goes to US, in Maibocks the top beer is a US beer, though not heavily reviewed to so to go to number 2, it's also a US beer, Go to a style you 100% expect German's to own Marzens or the Oktoberfest beers, you have 3 Americans to one German, Munich Dunkel Lager? 1 German and 1 US brewery earned top marks. Munich Helles Lager? Same thing. Rauchbier, USA, Schwarzbier tied at 1 a piece, Vienna Lager? USA.
To drive this point home. 3 of Great Lakes German inspired beers earned Beer Advocate 100s or a 99. US brewers have mastered most of the classic german styles and I think that's because we're not limited to expectations like German brewers are. Miller, Coors and Bud are all founded by German brewers where consistency is the thing that matters.