They don’t really take the risk away. The startup can easily fail, leading to having to find new employment, probably the founder was making less than in a corporate job. Also there’s the risk of being replaced if you do succeed
This. I've seen multiple sad stories around of me of studio-incepted ventures, whose founders were replaced once the company started to be successful and the higher hand decided that they were no longer needed; obviously this part of the journey is not advertised on the brochure.