Paris FC joins PSG in Ligue 1. Why did Paris wait for 35 years to have two top-tier soccer clubs?

Paris FC joins PSG in Ligue 1. Why did Paris wait for 35 years to have two top-tier soccer clubs?
Paris FC, recently acquired by France's wealthiest family, has earned promotion to France's top soccer division, joining Qatar-backed Paris Saint-Germain in Ligue 1. The lack of top clubs in Paris is attributed to historical, economic, and cultural factors.