No model will ever be perfect, especially in a sport like hockey. It’s not a realistic assumption. Nor is tailoring a model to cater to players or teams that are more anomalies than typical.
If I challenge any fan here to make a better model, the response would be crickets.
Is Dom’s model perfect? No. Do I put a ton of stock into it? No. It’s just a tool. It happens to be one of the best ones out there, even if it’s flawed. But no reason for people to get bent out of shape over the model or his poor takes.