It lowers the cost of failure (downside), but also the potential impact of success (upside). This approach determines your mindset as a product designer and destroys your potential product/business upside upfront. Most users get pitched "understandable ideas" because builders think they have to prove market fit before building product depth.
The most successful companies don't discover markets, they create them. Most visionaries forge the macro (10x) jump and then ask customers for the micro improvements. The meaningful, big-leap innovations are often not obvious from the start: If you're creating something that will be a great company 10 years from now, most people will probably not get it at first.