Thing that didn't fit 1: Agriculture is more and harder work, and provides a less healthy diet and a lower standard of living than hunter gathering. This has been confirmed by examining the skeletons of people from before and after the adoption of agriculture in areas as far apart as Southeast North America and Southeast Asia. So why did our ancestors do it at all?
Two answers. One, our ancestors didn't know what they were getting into - they followed a long path of small steps from gathering food plants, to figuring out that weeding made food plants grow more and better, to figuring out that you could plant seeds and have them grow into more plants, to keeping gardens, to becoming dependent on a limited number of now-domesticated plants that were far more productive of food than all the others. Each step of the way was a rational choice to get better food security.
Two, for those people who adopted gardening or full fledged agriculture, rather than evolved it over many generations, it was clearly more work, and nutritionally it was worse, but it also delivered much, much better food security. And that was the most important thing. People want to not be in danger of starving much more than they want to have an easy life with fewer working hours, or even have a healthier, more disease free life.