It's not so simple, especially in the AI slop era. Reviewers are already flooded because people of varying skill opening PRs at a rapid rate and it's not practical to be able to dive deep into every line. It's up to the implementor to take some responsibility and make sure things are correct.

Because of the AI lunacy going on at most companies, if you call any of this out you get labelled a luddite and are put on top of the layoff list, so at least for now it's just something you have to deal with.