The decision was simple. The offense proved that it can't be fully trusted that close to the end zone. The O-line wasn't protecting the best and Dak obviously hasn't been the most trustworthy lately. How many unnecessary sacks has he been taking?
Yes, it sends a message that you don't fully trust the QB or the Offense, but they earned that lack of trust. How much did the Cowboys win by? Yeah, it was the right decision. Shut up Jerry.