Why does Spotify not include a Waltz Genre to complement Pop, Rock, Hip Hop etc?

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What do the most popular songs of Ed Sherran (Perfect) Elvis (Can't Help falling In love), John Lennon (So This is Xmas), Billy Joel (Piano Man), Conan Grey (Heather), Taylor Swift's love songs (eg Lover),  Alicia Keys (Fallin, If I ain't Got You), Goo Goo Dolls (Iris), Metalica (Nothing Else Matters), Bob Dylan (Times They are a Changing), The Animals (House of the Rising Son), Beethoven (Fur Elise, Moonlight Sonata), Mozart (Lacrimosa), Brahms (Brahms Lullaby), Vivaldi, Vaughn Williams, Elgar, Wagner (Ride of the Valkaries) and 100s of other big pop artists & classical  composers have in common?  Their most popular songs on Spotify platform are all Waltzs. Their most downloaded song on Spotify is in 3/4 or 6/8 waltz beat.   Waltz beat is used in everything from indigenous music (ie the Māori Haka) to African drumming, to Celtic Folk/Folk Music, to Folk Dancing (Gypsy, Flamenco, Tango, Celtic, Irish Jig), Ballroom dancing to all forms of classical music, cinematic soundtracks, and modern pop, rock, gospel as evidenced in the list above of contemporary waltz pop and rock songs. In the spirit of Spotify offering choice, helping spotify users find easily the most popular modern and classical music, and in the spirit of honouring world music traditions in an inclusive way, why not add a Waltz Genre to Spotify to complement Pop, Rock, Hip Hop, Chill etc?  There are already 1000s of Spotify Waltz songlists - by music genre - made by Spotify users, and over 30 official Spotify generated Spotify Waltz songlists (ie Spotify Waltz Mix, Spotify Waltz Pop mix) by music genre already created on the Spotify platform. So, it would be easy for Spotify to create a library of existing Waltz music songlists to sit behind a Waltz music genre Icon.