@CMoore : here are some of Doisneau's photographs taken during the war. They illustrate much more what you were expecting. It's obvious that post-war he became more interested in being a witness to the positive and optimistic atmosphere that followed the difficult 39-45 events.
Mobilisé en 1939, Doisneau retrouve à son retour un Paris occupé où il va user de mille expédients pour subvenir à ces besoins. La presse étant quasi inexistante, il réalise quelques publicités, assure une série de portraits de scientifiques à la demande de Maximilien Vox. Son activité est...
loeildelaphotographie.com
thank you for the link and the photos. Here's a translation of the text beneath them, useful, IMO, to replace in context the discussion and the OP's question. This fills in information that MIGHT be helpful in clarifying some of the speculation voiced.
"Mobilised in 1939, Doisneau finds on his return an occupied Paris where he will use a thousand expedients to provide for these needs. The press being almost non-existent, he makes some advertisements, ensures a series of portraits of scientists at the request of Maximilien Vox. His activity is also underground since he manufactures, throughout these dark years, false papers for the Resistance. Nevertheless, he managed to illustrate some aspects of daily life: rationing, queues in front of shops, air alerts. Among these images that have become exceptional documents is the photograph of the fallen Horse (1942), which he considers a metaphor for the country's situation.
In August 1944, when the Parisian insurrection broke out, Robert Doisneau was taken by a real frenzy of photographs. It's a new start. Travelling Paris by bicycle, he made an impressive series of shots that have become classics. Portraits of women, children, men in the euphoria of regained freedom. Little violence in these abundantly published images but already a lot of tenderness and empathy for his fellow human beings.
Doisneau also realises for Pierre Betz, publisher of Le Point magazine, a series of images with an exceptional atmosphere on the clandestine press under the Occupation.
This period saw Robert Doisneau enter a profession that was close to his heart."