Sunday school is not a public institution, which is why it gets a pass. Similarly private schools are free to do this all week long.
I think even this supreme Court would rule the correct way. I wouldn’t be surprised if it were even unanimous, but at worst I’d expect the 6/3 split with Thomas, Goraych, and Alito. There’s only so far they can go when the Constitution was very blatantly clear on this matter.
Or there are plenty of societies at least as advanced as we are, but we can’t find each other because space is big and our stars tend to drown out our own puny EM emissions.