4 Guys on the floor....

[Nevadaref]

Perhaps the officials didn't notice, perhaps the rules committee believes there is no need for a case play stating to immediately call a T as it is obvious from the rule, or perhaps the rules committee felt that it was more important to use the case play to explain the reasoning behind why all of the players have to return at the same time -- it could be used deceptively to gain an advantage in the manner described in the case play.

Just some thoughts.