Code breaks because people read the comment and assume it speaks truth when in fact it's full of lies. And as soon as you don't trust comments you have to start reading the code. And if you're at that point now..... Why have the comment?
Comments don't replace reading code, they prime your brain for the code you're about to read. There is often context and reason behind the code that is not in the code itself.
If you ever trust comments over code you really need to adjust your approach. Comments are there to help guide you towards the intent of code, not to let you ignore code. Same reason why if a function has a bug, you don't ignore that bug just because the function's doc says otherwise.
