I’m not saying you shouldn’t care. Part of the Stoic philosophy is being able to realize when doing something matters and when there’s nothing left to do. Had there been anything I could do to recover my stolen things, I would have done it, for sure. But I just didn’t think there was a chance. And even if there had been one, being upset wouldn’t have helped me anyways.
I guess the way to differentiate stoicism from apathy is being wise enough to realize when reacting emotionally helps you and when it doesn’t. Sometimes you need to get angry or upset, but not always. And not sweating the small stuff gives you more energy to solve those few problems that do require your energy.