Nationwide injunctions are a very recent legal innovation -- as in, extremely rare until the 2000s, and uncommon until the 2010s.

They were not how this situation was handled for nearly all of the existence of the United States.

https://en.wikipedia.org/wiki/Nationwide_injunction

Seems like a perfectly valid one. If the government is violating the constitution or a persons rights why should there be suits all across the country to get that recognized? Especially when the question isn't on something with a lot of particularized tests that's sensitive to the exact case, eg 4th amendment law? Why should rights be so dependent on someone in my particular part of the country having sued?