Yes, but also no. The GDR and the Soviet Union who supported it and supplied it were both almost bankrupt and economically broken. Infrastructure was falling apart because the state couldn’t afford to fix it.

The potests sure helped, but the government of the GDR was also in a state where it would accept the demands as a way out. The protests probably did accelerate the downfall a bit, but it would have happened either way.

Similar protests years before were leading nowhere.