You need to take into account the context of his comment. He wants tight ends fully involved in the offense. Miami has traditionally excellent tight ends. Last season the room was limited by Arroyo’s injuries, McCormick’s role as a blocker, Riley’s (and Carver’s) inexperience, and Skinner’s lack of development. This plus quarterback problems after the first four games.
There simply wasn’t playmaking talent to take advantage of and coaches had to make do.
“That’s not us” simply Mario’s way of saying “That’s not what I want us to be”.