That's a remote possibility, but no mention of any such prolem was made during the extensive development of the 1911 pistol. The original gun had a "substantial" mainspring, so clearing a dud and going to a fresh cartridge would have been a better option.
The reason for the longer/wider hammer spur was never left in doubt. The Army said: "in order to provide more thumb contact during cocking."
A lot of folks that are knowledgeable about Cooper's "modern technique" haven't really studied the history of the pistol that's its centerpiece.
Understand that I am not advocating carrying the pistol in this manner, but rather pointing out that it was done (extensively so before the 1970's) and is still being done today to some extent. In theory this should have resulted in a history of unintended discharges, but in practice it doesn't seem to have been the case.
Prior to the 1911, Browning/Colt's .38 pistols, that had neither a grip or manual safety, were sometimes carried chamber loaded/hammer down, and again we don't find a history of accidental shootings.
Between the World Wars the Shanghai (China) Municipal Police ordered their .45 and .380 Colt pistols to be modified or bought them from the factory with the manual safety blocked in the off position with a screw. That left the grip safety and nothing else. This practice was ordered by William E. Fairbrain of Fairbrain/Sykes fame, who knew a lot about (1) close-quarters gunfighting, and (2) pistols. Of course neither knew anything about Jeff Cooper, and perhaps if they had it might have made a difference - but then maybe not. The more important point might be again that they didn't have an inordinate number of unintentional discharges because of the practice.
History gentlemen - study the history. Everything in the 1911 pistol was done for a reason.