I’m not sure about this. The mere example of fallibility alone to me would only suggest a character isn’t omnipotent - meant to be a human, but not necessarily a character in a realistic tale.
Bond is a disguised Saint George - therefore his trade has to be slaying dragons. Reality is an important ingredient as a veneer, not in absolute terms. It’s meant to look like our world - much like the pages of Architectural Digest look like our homes. And it’s keeping lockstep with the topics of our times, energy crisis, space entrepreneurship, terrorism or authoritarian excesses - but none of them are actually solved by Bond or even just taken seriously. They are the scales on the armour of the dragon, nothing more.
Inside that habitat of ersatz-mythological lore Bond’s mistakes to me don’t point to realism but rather to the obstacles he has to overcome, his own nature amongst them. They are his Achilles heel, but not there to bring him down, rather to grow above and beyond the ordinary human level - while still keeping to the fiction he could falter*.
Bond survives his adventures and wins his battles mainly by physical courage, endurance and (often unfounded) optimism. In the end it doesn’t matter how ill equipped he is and how badly the odds are stacked against him, he must bring down the dragon.
The fact that he does time and again points more to wish-fulfilment than anything we would observe in our reality. Bond is a faerie tale for grownups.
*And in doing so this growth beyond the ordinary suggests we - the readers, the audience - could also surpass our own limitations, if we were just motivated, courageous, persistent and confident enough. We know that’s tosh, but the idea flatters us nonetheless. And - it’s not entirely tosh. We may not be able to kill dragons or force hijacked airplanes to emergency ditch in the Atlantic. But on a more ordinary level we are capable of surprising feats of human spirit, as Fleming and many others witnessed in the war. Up to a point, that was what Fleming set out to remind his readers of.
