At first I thought the penalty was excessive, but then I saw additional information. Vettel was in the wrong, he looked in his mirrors, then went right towards Hamilton,
https://www.motorsport.com/f1/news/reason-vettel-punished-canada/4461461/.
Sux that Vettel had to crack under pressure. I think Hamilton had more pace than Vettel and if he had gone by, it would have been game over for Ferrari.