A certain faction of the target rifle crowd here were fans of the one piece stock. As far as I could find from questioning some of the suspects

it came down to a belief that two piece stocks were inherently prone to flex at the joint causing inaccuracy. I suspect that at times it was a symptom of a Mauser prejudice and an emotionally-driven determination to make the Lee Enfield, whose compensation and long range accuracy they could not afford to ignore competitively, more like the rifle they preferred for its supposed mechanical superiority!
Interesting little rifle that; someone making something useful out of the surplus stuff that was once so plentiful they were at times just throwing it away.
Your comment on the Tokarev Ridolpho reminds me of the Ross MkIII stock wrist: awful in a word. Odd since the Ross sporting rifles (and the MkII rifles) had such superbly formed stocks, but with a front locking action, the amount of additional metal required to provide for a two piece stock is hard to justify, though the advantages are many: ease of maintenance, use of materials, fitting of the rifle to the soldier etc.