If California put the same restrictions on grocery stores, as it did churches they would be more consistent with US law. Otherwise, the government has to prove that the difference in restrictions is so important it outweighs the religious concerns raised by the plaintiffs. (This is a high bar to reach in the US.)

The SCOTUS is being lazy by letting CA characterize a church similarly to a commercial movie theater. That is nonsense. A person can miss a movie without risking eternal damnation, but this may not be true for some church services for some Christians.