[shortimer]

Isn't the underlying assumption here that the team members know everything they need to know to make a decision?

While that may be true for, say, algorithm selection, I would argue that, at least in larger organizations, there are overarching architecture or standards that need to be considered, and that it may be a waste for the individual team members to constantly keep track of.

We had a super-smart team come in a few years ago, and work very independently to come up with an awesome standalone solution that worked in no way, shape, or form with the millions of lines of installed code. There's an argument to be made that perhaps that's great and they were not constrained by legacy code, but decisions like that should be made purposefully, not based on how a few smart people who know almost nothing about the broader business or technology feel.