Finneas has no desire to reach his sister Billie Eilish's "untenable" level of fame.
The 26-year-old musician, who co-writes and produces all of his younger sister's songs, insisted on the Armchair Expert with Dax Shepard podcast that he does not aspire to the Bad Guy singer's level of fame.
"Being as famous as Billie is a nightmare. I would never want that. She wears it really well and she is actually a rock star," he stated. "I see it at a function and I don't want to have that and I don't pretend to have it. The consequence of that is she can't do anything. She can't really walk around."
Finneas explained that he tries to suggest ideas to get her out and about but they often become "kind of a disaster", citing a time they went to a sandwich shop at a quiet time of day and the staff were "so weird" and wanted a photo, while other patrons filmed them.
"There's a echelon of fame that's many many many rugs higher than I am that's untenable," he added.
The songwriter also noted that members of the public treat Billie, 22, differently because she's a young woman.
"I think that people interact with women differently in the public eye," he explained. "They're not intimidated by them in the way that they should be and the way that they are respectful towards men. They have no compunctions about putting a phone in Billie's face and being like, 'This is my sister on FaceTime.' I know that it's all a privilege and we're all lucky but it's f**king rude.
"I don't actually feel bad about saying that because everybody's so checked out of common courtesy and you wouldn't do any of this stuff to your friend... It's just absolutely rude."