It's not about psychedelic or whatever you're referring to when you say prog.

Originally, prog meant incorporating jazz elements into pop. If we use that definition, most prog rock from the 70s isn't prog.

Honestly the bottom line is lankum take the framework of folk and use other genres peppered in to create an expansive experimental folk sound. Whether you like it or not, this is the core definition of prog and always was. If you care enough, you can DM your prog heroes and show them this description.

Actually the real bottom line is: trying to label genres and subgenres into an experimental sound is futile and constrictive and pretty fucking pointless imo rendering this whole thread redundant.