I can kinda understand why the developers prioritize other features.
The software is aimed at visualizing buildings. Video textures could be useful to create ambience and make rooms feel alive, but so could animated people/ trees/cars/doors/escalators etc.
It makes sense to optimize Enscape for static scenes, before moving on to animated scenes.
Having only animated textures, while everything else in the video is static, would feel a bit like a gimmick to me.