Chilli Monster,
Good start, but your FIS suggestion in para 2 might be scuppered by the concept of Duty of Care. If you are providing FIS while watching radar and happen to spot a real nasty situation, DoC will require you to call traffic. (Or, as I had happen recently, stop a very sensitive aeroplane from flying into a mountain.)
In many cases DoC works contrary to the drafting of ATC rules.
But however rules are written there will always be accidents. Management is then obliged to take action, which results in so many orders starting with the phrase 'A recent incident has highlighted the fact that ......... In future all controllers are to .....'
We now go full circle to the start of this thread.