Yes and the reversal of safety calculations really surprised me. "The orbiter has a total fail rate of one in 1000 so this individual part is higher than 1 in 10000", something like that. Where neither premise was actually tested or verified. Just specified on paper as a requirement and then used for actual safety calculations.

I don't know how a big organisation can think like that. But I guess these calculations were ones out of millions of ones made for the project.

The bigger an organization gets, the more internal overhead it has. At some point, it would take divine intervention for important things not to get overlooked or lost at some junctions in the org chart.