The very most important thing about having the all-things-considered view is not multiply propogating the consensus belief, especially when the information flow is one-way: if you report your credence after updating from a consensus that you didn’t agree with, but without causing the consensus to update at least a tiny bit towards your belief, then someone who updates their inside view with the view you have after updating on others, and on the view that others have without updating on you, will develop and propogate errors even if everyone involved is doing the math diligently and accurately.
The very most important thing about having the all-things-considered view is not multiply propogating the consensus belief, especially when the information flow is one-way: if you report your credence after updating from a consensus that you didn’t agree with, but without causing the consensus to update at least a tiny bit towards your belief, then someone who updates their inside view with the view you have after updating on others, and on the view that others have without updating on you, will develop and propogate errors even if everyone involved is doing the math diligently and accurately.