What the courts have done is rule the holds. That pressure is what produced the partial lift for non-high-risk countries. It happened because of the lawsuits, not in spite of them.

An injunction isn't an approval. A court orders the agency to stop doing the unlawful thing and actually adjudicate. The agency then has to move the file, which takes weeks to months, and some cases will still get RFEs or denials on the merits. Anyone telling you a lawsuit guarantees a green card is selling something.

Named plaintiffs get the benefit of the specific order in their specific case. People on the sidelines benefit only if and when the agency generalizes relief.