Calligraphy has been a big part of almost every culture with writing for millennia and will continue to be for millennia to come. It exists because it looks cool, trying to justify it with writing speed or whatever is just some bazinga brained bullshit and thinking it needs to be eliminated because "muh computers" is even more bazinga brained bullshit.
Althought listening to millennials talk about the experience of learning cursive I can sympathize a little. Somehow Anglos can't even teach their kids cursive without beating them or otherwise traumatizing them.