You're right, stealing the food directly is more immediate. But assuming you're planning ahead or are selling to a known buyer, the Vuitton bag is far better.

Pragmatically - You have to steal fewer items with less security, so less risk of getting caught. It's lighter to move. You can use that money for clothing or rent. You can use that money to buy a lot more food.

Meanwhile, it seems as trivial to justify to a judge. You needed food, so you stole something to get food. Certainly, I consider it to be at least as moral as stealing the food directly, so I don't understand why it would be harder to justify. Unless your contending that stealing beans is obviously for feeding kids, but stealing a bag isn't? That is, you're asking for leniency and not debating morals. In which case I would ask you if motive matters to a judge or if that means your kids are more likely to get taken away or can you not get the same effect by just keeping better records? Receipts of how your spent the bag money.