Zeitgenossen literally translates to "contemporaries" or "peers." It's a more formal and somewhat old-fashioned word than simply saying "people" or "guys," making it stand out.
In the song, Die Ärzte use it humorously when they sing, "Schlecht gelaunte Zeitgenossen könnten uns an dieser Stelle Vorhaltungen machen wegen fehlendem Niveau" (Bad-tempered contemporaries could at this point reproach us for lacking sophistication). It's a clever way to address potential critics of their simple, catchy song, adding a touch of self-aware irony.
Get ready for a super fun and a little bit silly song by the German band Die Ärzte! "Schopenhauer" is a song that doesn't take itself too seriously, and that's what makes it so charming. They start right off by calling it "ein wundervolles Lied, ein bisschen hirnlos, aber schön" [a wonderful song, a bit brainless, but beautiful]. How great is that? They're basically telling you to relax and enjoy the music without overthinking it.
The band even pokes fun at themselves, singing "Schlecht gelaunte Zeitgenossen könnten uns an dieser Stelle Vorhaltungen machen wegen fehlendem Niveau" [Bad-tempered contemporaries could at this point Reproach us for lacking sophistication]. But they're ready for it! Their hilarious response is to just list a bunch of famous philosophers like Schopenhauer, Hegel, Kant, and even Beate Uhse (who was a German entrepreneur known for adult products, which is a classic Die Ärzte joke!). It's a playful jab at anyone who might criticize their simple, catchy tune, proving they're all about having a good time. They even promise, "Kein Wort von Sex oder Gewalt, diese Zeiten sind vorbei" [No word of sex or violence, those times are over], which is pretty funny coming from them, as they're known for their cheeky lyrics!