I saw Alice Cooper with *Flo and Eddie* (Howard Kaylan and Marc Volman, formerly with The Turtles and Frank Zappa's band The Mothers of Invention) back in the '70s. They performed in a smoky university coliseum. I remember all of it being outrageous, funny, and silly.
Not all rockers are obsessed with "sex, drugs, and rock-and-roll." Brian May of Queen has a PhD in astrophysics. Linda Ronstadt had a storied career, dating California Governor, Jerry Brown, and crossing over the genres of folk, rock, country, jazz, American popular song, and opera.
Graham Nash (Hollies, Crosby, Stills and Nash, CSNY) became a photographer and opened a high end boutique digital photo lab, Nash Editions.
Careers of musicians tend to be short, unless they keep making and selling recordings, and touring to promote them. Of course, if they hit it big, and invest wisely, they can retire early or move to Las Vegas with a show band. But that bores the good ones.
Some interviewer recently asked the three brilliant, hard-working sisters of Mexican bi-lingual rockers, *The Warning,* what they would be if they weren't in a band. "Teacher." "Writer." "Model." They've been paid to play since 2014, when they "blew up the Internet" at 9, 12, and 14 (!). They have since recorded three albums and toured the world, so they have a way to go before seeking other employment. Their adult peers in the music business consider them forces of nature to be nurtured and appreciated.
So yeah, don't let the makeup, costumes, or the music fool you.
It's always amazed me that many creative people are creative in several different disciplines. One skill leads to another and another... It all relates over time.