It's from 1944 for a reason.
<36...Nf3 would be strong too, right? e.g. 37.Nxf3 Qxf3 38.Qc7 Bg5>
It would (according to Bronznik), but your line is not testing. White can win the h3-pawn with 39.Qc8+ Kg7 40. Qxh3.
However, Black then has 40...Qh1+ 41. Ke2 Qb1!. Now White needs cover b5, but 42. Nc7 Qc2+ (42...Bb4!) drops the knight, so 42. Qd7.
Now 42... Qd3+ 42.Ke1 Ba3!! gives Black a decisive attack. White is mainly unable to prevent Bb2-c3+.
In short, Bronstein played it safe.