Yes, that's true, there was crisis and instability which culminated in the regime collapsing after the Nazis occupied Paris.
The Republic have fallen after. You've plenty of historical context where the fall of the capital didn't lead to the fall of a state.
Well, the simple fact that the IIIrd republic transformed itself into Vichy Regime because of the fall of Paris (something they totally allowed by imp reparation (not talking about the fact they tried to encourage Hitler attacking East since 1936), making authoritarian decisions against their own population, and being a flawed regime.
I'm not sure why you mean by "the German resources" that provided the first decade of growth. Do you mean after WW1, when France was receiving reparations for the German exploitation of their country?
The reparations made by Germans exceeded what France known as destruction, around 150 milliards of gold-mark while the damages were estimated for France around 125 milliards of gold-francs.
And i'm not talking about a real plunder of western Germany concerning resources.
I know that people hate democracy on this site, but you could be fair. The Kaiserreich got whupped by a broken system.
You know, i could ask apologies for implying i'm hate democracy, and i'm a fan of military dictatorship.
Nevertheless, i will answer that. The fact the German Empire wasn't exactly the good guy of WW1, they weren't the "only responsible of the war", or the country that alone wanted 4 years of devastation everywhere in Europe.
This accusation allowed French government to take whatever they wanted. If the course of events would have been different, we could being talking about "France would have deserved what happened because it was the only responsable of the war" as a justification of Germany to take whatever they wanted.
So yeah, considering the difference between damages and reparations, the fact France never had to pay something for the devastation caused by its army, really helped french economy.