because quality has never been the driver of survival. It has always survival. The race is a race of endurance, it's not a competition on merits. Humans would undoubtedly be better without scars, but the same anomaly that gave us scar tissue, gave us faster wound healing. Increasing survival. But scars don't go away, when it'd be better if they did. There's no selection pressure there because it's good enough. IBM still exists despite it's inability to make good decisions, it makes decisions that allow it to survive. It could just as easily make different decisions, and I would have named a different company. Not because it made different decisions, but because it survived. Why do companies that survive make these weird decisions? They don't, there is no back pressure. Decisions don't matter, survival does.
The race isn't a competition, it's a death march. If you want to 'win' the death march, prioritize survival above everything else, especially quality and correctness.
(I don't strictly follow this philosophy myself, a good engineer will always ask, why not both. Just make sure you identify endurance as the most important strategy)