Except SA specifically asked the court to require a ceasefire, which would have immediate consequences via security council vote and no more munitions landing in Israel. And the judges voted it down
This isn't a read between the lines situation, because SA's request was specifically for the court to temporarily rule for a full immediate ceasefire until the larger case could be heard
What is interesting here is that by mis-reading the verdict like yourself, and Israel assuming the worst, both sides immediately came out saying today was a huge win. So at least we have that, everyone (but the Palestinians, who aren't a side in this case) is happy