This can simply be summed up as: we're human. Humans aren't perfect and neither is the code we write. At best we can try to enforce checks and balances with CI

This can simply be summed up as: we're human. Humans aren't perfect and neither is the code we write. At best we can try to enforce checks and balances with CI and git hooks but since things always change, you'll come across some point where you need to make something in limited time and you'll have to compromise