Yeah I have been in favor of this in the past as well, but was more emphatic about it in the years before scoring averages, shooting percentages, etc. went up. I think the tighter whistle on landing area and 3-point attempts in general has led to effectively making the court feel wider due to defenders needing to jump straight up and down or risk fouling. But once more physical play is allowed in the playoffs, the court does seem to become smaller again. There are at least several hurdles to overcome in order to make a larger court:
The first difficulty will be an inconvenience for arenas. Such as situating the floor vs hockey boards or with the rows of seating in general if it is a basketball-only arena. Combined with essentially losing a valuable row of seats around the perimeter of the court. Queue the paraphrased Bill Belichick quote, 'maybe the NBA should hold a bake sale.'
But more difficult to navigate would be the Players' Association. IANAL (or union rep) but believe the 3-point line can be adjusted within reason without input from the NBPA, but the overall dimensions may need to be collectively bargained. And at a 4-6% dimension change, the players will say that is 4-6% more wear and tear from running mileage or loss in productivity since they can no longer last on the court for as many possessions.
Even the franchises could find a negative aspect to changing dimensions, because if the college courts stay the same that may negatively impact accuracy in scouting players for the draft.
Edit: good idea
@InstaFace