But I think these explanations can’t account for the longer arc of the trend’s popularity, nor its near neighbors in cottagecore et al, which also tend toward the Anglophilic and historical. Instead, it’s dark academia’s mix of aspirational and achievable that seems the most appealing to me
Basically he's saying: "They say dark academia just stems from an association with school-going needs and dark aesthetics; I say it is a community that keeps alive an intellectual world that unattainable in the modern world."