We, as an industry, didn't stop shipping bugs. (Small example: https://github.com/CVEProject/cvelistV5/releases)

And that thorough code review prevents bugs is, at best, a debatable assertion. See e.g. https://www.microsoft.com/en-us/research/publication/code-re...

It finds _some_ bugs. CI/CD, and a massive investment in automated testing has probably had the largest impact in moving software quality forward. (See e.g. "Accelerate", Forsgren, Humble & Kim)

Code review is an excellent tool to socialize knowledge and train up more junior engineers, but in terms of preventing bugs, it's low-value.