Nope they didn't decide that. It's actually even worse!
A lot of Americans have the impression that SCOTUS keeps deciding in the administration's favor, but this is not true.
SCOTUS is saying: "We're not going to hear this case right now, but we likely will in the future. In the meantime, we are going to overturn the lower court who did actually hear the case and allow the administration to continue its actions. No, we will not explain we think the lower court got wrong."
Increasingly these SCOTUS orders totally unexplained which is a blatant violation of their judicial obligations, and they are frequently unsigned by the majority (conservative) Justices. Presumably because they don't want their names written on papers that they know will be understood by future generations to be totally indefensible.
SCOTUS has proven itself functionally incapable of fulfilling its Constitutional duties and has proven that we need a lot more Justices. If you don't have the time to hear the cases we need you to hear, then the court needs to be scaled up and we can pick random panels to hear different cases.
Nothing to do with policy disagreements (how would any American even know if they had a policy disagreement with an unexplained, unsigned SCOTUS order?) – we just need courts that can decide on things that are important to our country.