The missing reviewer
You cannot proofread your own writing, and you cannot review your own work. The mistakes you make are precisely the ones your own mental model cannot see — which is why a second person catches them and you never do. Alone, that check simply is not there.
The rules a change has to satisfy are written down and then enforced automatically, so skipping a step is not a judgement call I get to make at midnight. Work that cuts a corner fails before it ever reaches a player. It is a poor substitute for a colleague, but it never gets tired and it is never polite.