system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why didn't the Potters choose Dumbledore as their Secret-Keeper?

Okay, it's quite understandable to me why they didn't go to the obvious choice, which is Sirius. Brave as he was, there is no guarantee that he could withstand all the curses that Voldermort would throw at him.

But Peter Pettigrew? Really? As much as they didn't know he had already betrayed them (kudos for counterintelligence, Albus), he is still Peter Pettigrew! His main characteristics are being cowardly and servile, and anyway it was known to the whole school that he was their friend. Once Sirius was tortured to death, who did they think Voldermort would turn to? Hell, anyone could assume that Voldemort would make a list of all their acquaintances and start torturing them one by one until he found the right secret keeper.

The only absolutely foolproof solution, the only one who would never be subdued by Voldemort, was Dumbledore. Had they relied on Dumbledore, they could have stayed hidden for decades without any problem whatsoever. And perhaps, if indeed desperate Voldemort had tried to defy Dumbledore, they would have solved the root of the problem with the death of the dark lord.

So what on earth was James thinking when he did not choose Dumbledore? Had deer antlers drilled into his brain?
gpt
Dumbledore offered, but the Potters chose Pettigrew. As far as anyone knew, Peter Pettigrew was fiercely loyal to his friend James Potter. For example, the other Marauders all expected that they would willingly die before they would betray their friends.

Furthermore, Pettigrew had the advantage of a long line of decoys in front of him. It was naturally expected that the Potters would ask Sirius, or Lupin, or Dumbledore, or another member of the Order to be Secret Keeper, rather than meek and cowardly Peter Pettigrew. Think of it this way: As far as Voldemort and the Death Eaters knew, Dumbledore really was the Potters' Secret Keeper. There's no way they could've known otherwise. They would've had to capture Dumbledore and extract the truth from him somehow, and only then would they realize that he wasn't the Secret Keeper at all. Similarly with Sirius, and Lupin, and all the other more likely candidates. In effect, the Potters would've gained the advantage of actually having Dumbledore, Sirius et al as Secret Keepers, without actually burdening them with the secret.

Of course, all of this is based on the assumption that Pettigrew was actually loyal to his friends, which as we know wasn't the case at all.