When life gives you lemons, make lemonade. When life gives you a box, make... well, that's not a thing.
But seriously, thinking outside the box can be really useful. It's like when your friend asks for directions, and you tell him to go the wrong way, and you both end up at a nice café that's really close, but you didn't mean to go that way.
Or maybe it's like when you're in a meeting and everyone says, "We need to think outside the box." And you're all, "I've got it! Let's just put our boxes outside the box, and then we can think inside it! Problem solved."