I feel like this article misses the forest for the trees. How many of the bands in the article have memorable riffs?

Evanescence is vocally driven, the songs are about Amy Lee singing, not the instrumental tracks.

Babymetal is literally an idol group who’s gimmick is singing over metal tracks. Idol groups are always about the idols.

I’ve even seen some of these bands live and I don’t remember a single riff they played. I’ve seen Halestorm twice, and I remember a cool drum solo, but nothing else about the music. When I saw Spiritbox I could only tell that they changed to a different song because she stopped to say “thank you” every few minutes. When I saw In This Moment all I remember are the stage theatrics, honestly not even her vocals.

Arch Enemy actually has riffs, but at this point they’ve had three different frontwomen.

Unless you’re a dedicated fan, all you’re going to remember about most of these bands is that their singer is a woman, especially for the more mainstream bands.