Drewes and Raabe struggled on "the leadership in music," and this made Joseph Goebbels happy as he could use their words as a threat to one or the other. Drewes worked in Deutsches Nationaltheater und Staatskapelle Weimar as a répétiteur and conductor. In 1930 he went in Landestheater in Altenburg as a conductor. He started there a local chapter for KfdK and the same year he went in NSDAP and wrote articles in NS-Zeitung and Völkischer Beobachter. Deutscher Musiker-Kalender tells in 1943 he was Generalintendant and Generalmusikdirektor. Denazified Drewes worked after the war in Nürnberg Conservatory. Later a story emerged that Drewes used pseudonyms as he conducted when working in the propaganda ministry. He conducted only with the radio orchestras. It was he who hired and fired the conductors. He may have used the name Hermann Desser when he conducted Felix Draeseke's Symphonia Tragica with Berlin Symphony Orchestra, published in 1955 by Urania Records. Alan Krueck says there is no such conductor as Hermann Desser, and the music was typical for the Third Reich and on the other hand the quality of the recording was consistent with that achievable at the time. Later Christoph Schlüren also identifies Drewes. Drewes appreciated Jean Sibelius and was the president of the German Sibelius Society. He wrote a preface to Ernst Tanzberger's dissertation Die symphonischen Dichtungen, von Jean Sibelius, eine inhalts- und formanalytische Studie. Tommi Mäkelä writes in his Sibelius biography that it was explicitly meant to be a greeting 'to our Finnish friends and comrades-in-arm.' Drewes himself writes that the symphonic sagas of Sibelius evidence that "while the Finnish Volk could be counted racially among the Finno-Ugric tribe," over centuries it had "turned happily toward the German world". Drewes was a friend of Richard Strauss, who asked him extend his protection to Strauss' libretist Joseph Gregor. Strauss again asked protection in 1939 to his non-Aryan daughter-in-law and grandchildren. The Swedish composer Kurt Atterberg was worried about the German conductor Helmuth Thierfelder whether he could conduct Attenberg's compositions, and about his possibilities to visit Sweden. The concertmaster of Philharmonischen Orchester Landestheater CoburgRalph Braun says the significance of Drewes has not been known until today.
