Is a hot dog cooker inefficient? Having one means that my kid might be able to cook something without help. It might seem like a waste to a chef, but that doesn't mean it's wrong. Don't chefs have multiple knives for different purposes, each being a separate "app" for a separate purpose?

You can take it too far, and I might agree that a hot dog cooker is a little specialized, but not necessarily. It could fit the situation.