Reducing the games does increase the importance. You cannot create these hypothetical anecdotes to argue that it makes no difference. The chances that Steph is playing in a game because it is important to him to win is greater in a 72 game season. The chances that Kawhi or Zion is playing in a game because the are healthy is greater in a 72 game season than an 82 game season. The incentive to play because it's important to win is always greater in 72 than in 82 and the chances of sitting due to inadequate health are always lower. I don't believe it is a complete solution, but I find it hard to believe that reducing amount of games does not make the games more important. I also think the Fast and the Furious movie is a dreadful comparison because while people line up for movie stars, explosions, and actions they do not line up for worse basketball compared to better basketball. If you can have some skepticism that better basketball may not produce better viewership, I have some skepticism that 82 games is the best way to generate revenue for the NBA long term.
This discussion is still fairly new and such a large change would take time. Adam Silver has stated he is open to the idea. CJ McCollum (speaking for the players) have said the players have discussed but no conclusion yet. It's not as if it is being voted on regularly and can be implemented in an instant. I'm pessimistic about it happening, but I don't take the fact that it hasn't been passed as an indication that it is a bad idea. I bet you can't find a single NBA fan who can't name something they wouldn't change about the league, but that doesn't mean all of the changes are bad idea. The financial implications of this move (both in short and long term) are not concrete. But the quality of the NBA product is something they should always be conscious of and increasing the quality of their product is the best way to keep revenue healthy.