Peter Laviolette was Filip Forsberg's coach from the 2014-15 season thru 41 games into the 2019-20 season.
They simply aren't comparable when it comes to development curve. You can believe in CMM having another level he can get to, and that's a perfectly defensible position in itself. But citing Forsberg is not a valid rationale. It's comparing Apples to Orangutans. Forsberg was a top 5 talent in his draft that slid to 11th because of buffoonery, and more or less immediately excelled upon his arrival in North American hockey. He was able to immediately win over a coach with a notoriously rocky record with young players, where McMichael was not (despite him obviously earning more slack than Laviolette actually gave him).