In an ideal world, Sebastian Vettel would not have been given a five-second penalty for rejoining the track in an unsafe manner during the Canadian Grand Prix, and he and Lewis Hamilton would have continued their duel to the chequered flag.
That this didn't happen is a consequence of the way Formula 1's regulations have, with some justification, evolved in the real world. The rules are written, interpreted and then applied - and, despite criticism of the FIA stewards in Montreal, that's exactly what happened.
And yet, this is supposed to be an era of 'let them race', where penalties are only used against egregious breaches of the rules. The fact so many professional drivers have criticised the penalty proves that this is the kind of hard, on-the-limit, racing they want to see - and understand.