I don't think the basketball analogy is fair because rule changes have all but eliminated the true big man. With the defensive 3 second rule a big man with a big body to play true post simply isn't quick enough to cover the ground. As for going across the middle or blocking I'm not sure what you speak of, receivers go across the middle on every play. And there are many great blockers in the league.
But I agree with the sentiment if not all the details.
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