Botvinnik´s "immortal" game was pre-aranged.
He was model for Cronstein-person in Ian Fleming´s "From Russia With Love", he constructed evil machines for KGB and atomic bombs department, he initiated "4 USSR players limit" in fifties and sixties so as to eliminate many of his own rivals, and by that he destroyed Leonidas Stein and Bronstein when they could put him in danger. He always had a bunch of lacays that served to him as "ghost-seconds" or ghost-partners.
The less said about Botvinnik the better.
He is pretty much a version of "Chess Turkey" behind Iron Curtain, with more far-reaching consequenses, he was a huge fraud which costed many their lives and life opportunities.