Finding six things is obviously easier, since it's the choice of "what's the specific thing I should do" that's usually difficult, not the enumeration of different choices.
The dice method lets you remove yourself from this difficult final decision -- and since the decision you're now reluctant to take is now just 1 in 6 or 2 in 6 or such, and you include safe options too (e.g. "do nothing"), it's easier to write them down (you still feel like you have a way out through the dice when you're writing the difficult option down, as it might not come up).
The dice method lets you remove yourself from this difficult final decision -- and since the decision you're now reluctant to take is now just 1 in 6 or 2 in 6 or such, and you include safe options too (e.g. "do nothing"), it's easier to write them down (you still feel like you have a way out through the dice when you're writing the difficult option down, as it might not come up).