Wait, you think chilling does nothing? That's wild. Every recipe I've ever seen says cold butter is the whole point. If your dough is room temp, the butter melts before the cookie sets. That's why you get puddles instead of cookies. Are you sure your butter was actually cold to start with? Like, straight from the fridge cold?
Ever see what happens when you skip the chill? My friend tried baking warm dough and got greasy blobs because the butter leaked out everywhere. So yeah, chilling is about the butter too.