I'm mostly saying that it's less about mistakes, and more about the team you build. Focusing on the positive, and not the negative, especially when these GMs adapt to the negatives and move on from them. Like for instance, Washington won the cup even though they made one of the worst mistakes of that era, trading Forsberg for Erat. Vegas was getting viciously criticized for tons of moves like Dadonov, moving Suzuki for Pacioretty, who they gave away for almost nothing, and they gave him away before they even won the cup.
What I'm saying is that the mistakes don't matter as much as the good moves. Vegas won because they got Pietrangelo, Eichel, Barbashev, Stone. Fans focus on the negative, but those don't matter nearly as much.
I'm noticing similar quality out of Holland. He got Kane, Ekholm, Hyman. Brown is also probably going to be in that tier. Heck even Ceci, Smith, and a lot of other subtle moves I liked. And, just like Vegas he's made slip ups but I don't think those really matter. Holland gets criticized that we need real success, but all these winning teams get the same criticism until they win. The trick is not to over-react to the lack of success. Is the team trending towards a cup or not?