Walking Dead is gone now, but for about 8-10 years it was a cultural touchstone. It was one of the biggest horror properties of the late oughts early 10s. It may be overplayed to Horror Nights fans in 2021, but there is absolutely a reason why it was around as long it was. Calling it a passing fad is not giving it its' due respect.
Billie is also not a passing fad, but for other reasons than Walking Dead. One of the biggest names in music right now and there was definitely a natural progression in pop music to bring us from the likes of Lorde to Halsey to Billie. Not a one-hit wonder or fluke indie star either. Her full horror inspired phase might be ending, but she has made some dark alternative music before "when we fall asleep" and I doubt she's going full bubblegum pop after this either.
I think I said this last year when Billie was first being talked about, but I've found that generally the only stuff that gets this much vitriol in popular culture is stuff that appeals to girls, mostly teenage girls. Bieber, 90s Boy bands, KPop, Twilight, Titanic. None are as bad as people said they were at the time. I feel like if it was a Slipknot or Korn or Iron Maiden house it would've been a whole different story, we got a Rob Zombie house AND zone last year and no one said anything. I'm not saying it's a conscious decision from anyone, but it's just weird for this house to get this harsh of a reception. :shrug: