The ink is far from dry on the merger announcement between WarnerMedia and Discovery, but that isn’t stopping executives from both sides making arrogant public statements that may come back to haunt them. HBO Max’s Andy Forsell is the latest to drink from a potentially poisoned chalice as the video streaming platform’s EVP and GM declared that the new ad-supported version of HBO Max has a far greater total addressable market than Netflix. Getting people to pay for premium ad-free video streaming experiences is a proven business model, while getting consumers to pay for ads is a growing phenomenon that we consider still very much in the trial stages. HBO Max’s ad-supported tier costs $9.99 a month, $5 less than…