that's absolute nonsense.
Have you ever spent time talking to refs? If so, you'd know that what you are claiming is virtually impossible to accomplish.
The NBA and the TV network probably hope that the series goes 7 games. But they have almost no ability to cause that to happen.
Perhaps if the ref crews were the same throughout the series, a league that wanted to influence games might be able to accomplish some degree of input. But that's not the case in the NBA finals. Game 4: Crew chief - James Capers, Referee - Kane Fitzgerald, Umpire - Eric Lewis ; Game 3: Crew chief - Scott Foster, Referee - David Guthrie, Umpire - Courtney Kirkland; etc.
There are 12 refs assigned to the NBA finals, based on how they graded out during the first three rounds of the 2022 playoffs. In addition, 6 other refs are selected as alternatives for the NBA finals in the event that any of the 12 assigned have injuries or other issues that prevent them from working a game.
And FWIW, the last 3 NBA finals went 6 games. The 1 before that went 4 games. The 1 before that went 5 games. It's been 6 years since a NBA final went 7 games, so if the NBA had such a dire need to drum up interest in their product, and was fixing the finals to go 7 games, they've done a pretty bad job of it in the past 6 years. Heck, in the past decade, only 2 series went to 7 games.