Totally agree. The Celtics' problem is offense. And, it's a big problem.
Another legit scorer, just one, would change everything, including making the defense better by making the opponent work harder on its own defense, leaving it too fried to sustain its offense and eventually defense, as well, which in turn would make the Cs' offense even more formidable over the course of the game and particularly down the stretch.
For all the people who still want to take IT to task for his supposed defensive liabilities, imagine where the Celtics would have been this year without his offense. Most likely not in the playoffs. Then, imagine how good the Cs would be with another scorer, or two, somewhere near his caliber.