It's true. So far, from most networks, states have only been called for the candidates that had the polling lead. The only exception is Florida, which some networks have called (probably rightfully so) for Trump, and which Biden led by a whopping 2.5 points, which is a miss, but it's a miss by far less than a standard deviation. In other words, it's a small enough miss that it can be explained by nothing more than random sampling error.
Now, if Trump wins Michigan or Wisconsin, then you have an argument. That requires some sort of at least moderate systemic error in polling methodology. Random error isn't enough.
But don't but the cart before the horse. Those states are still uncalled by everyone.
