I think the thing with Monaco is that while it's tight and makes overtaking difficult, it also means the margin for driver error is zero.
It would only have taken one of the top six to misjudge a corner, especially when it started raining, and the whole result would have been different.
It didn't happen today, which is a credit to the drivers, but the incident at the start shows the potential for carnage.
The problem there is, Webber realised that YOU CAN'T OVERTAKE. Chance of making a mistake at your limit is vastly higher than chance of making a mistake well under that limit. So what did he do, drop 2 seconds off, massively increase the margin for error, and there was zero penalty for doing so because no one can overtake.
At track A you have to go 99% the limit of the driver and the car to stay ahead, and in doing so more mistakes are made, at Monaco, because no one can pass you, you can drive around at 80% of what the car and the driver is capable with next to no chance for error... and still have almost no risk of being overtaken.
Webber's pace showed exactly how you can ease off complete, essentially turn it into a risk free race, and still no one behind has a chance.
Also its massively overplayed, margin for erro zero at Monaco, lol, rubbish, Webber went over the chicane at least twice, that we saw, probably did it more. Everyone locked up going into corners, people tap the barriers and each other, no margin for error.... not true at all, less margin for error, but a track where you drive differently one mistake at any race can put you out, realistically the difference is in the consequences of the error, rather than the margin for one. Round most tracks you go into a gravel pit and can't get out, around Monaco its a wall and its painful.
button spun, Perez spun, both went on, Kovo broke his wing, loads of people made mistakes that didn't instantly end their races, just like any other track.