system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why didn't the Potters choose Dumbledore over Pettigrew to be their secret keeper?

I know they chose Peter over Sirius because they thought Sirius would be the obvious choice and would be the primary focus of Voldemort, plus they trusted Peter as much as they did Sirius and Remus. But it seems that Dumbledore would have been an even smarter choice.
gpt
Consider a scenario where someone really, *really* needs to find the Potters on legit Order business. Dumbledore is up to his neck in war-related responsibilities, and being the Potter's bouncer/call screener on top of that is a duty he really doesn't have time for. Pettigrew, by contrast, has a lot less on his plate, and at least in theory should have been a rock solid bet in terms of reliability.