Good to see some love for this one. And don't look for 'explanations' - just decipher it any way you choose.
I was lucky to get to host an online Zoom thang with director Mark Jenkin last year, with onscreen participants offering their own questions. It all went pretty well, though I think I rather baffled Mark when I suggested that the wartime Arthur Askey movie 'Back Room Boy' was "the Enys Men of the 1940s"... (it is, by the way.)