Other clubs in the French ligue 1 need to do something about improving their performance so that the French ligue 1 will become more competitive, which will attract more people into watching French ligue 1 matches. It's not that Marseille, Monaco, and Lille don't want to invest in their squad so that they can have a chance of winning the French ligue 1 title, but they lack enough resources to overhaul their teams to the level where they can win the league title ahead of PSG.
Not only will the French League be competitive but it will become even more intriguing and catch more interest of many others to wanting to watch their games and support the league, somehow I want to believe this is known to all those other teams in the Ligue 1 aswell it is just that they probably do not have what it takes to change the narrative now, probably resources or the quality of their teams is not as improved just yet and they lack what it take to implement such improvements.