There are several reasons to use a Wizard of Oz MVP: 1. Cost Efficiency: It allows businesses to test an idea without a large initial investment. 2. Speed: You can get a product to market faster by doing things manually instead of developing complex systems. 3. User Feedback: It enables businesses to gather real user feedback early in the process, which can be critical for product development. 4. Risk Mitigation: By validating the concept early, companies can avoid the risk of investing heavily in a product that may not meet market needs.