It's true that in a lot of cases, the simplest solution is the best solution. For example, if you want to lose weight, eating and drinking less is the right sol

It's true that in a lot of cases, the simplest solution is the best solution. For example, if you want to lose weight, eating and drinking less is the right solution, not to exercise more. But in situations with complex dynamics of nature, such as the one in the comment you replied to, there are often unforeseen laws of nature or physics or government that make things more complicated, that only the experts really know about, so that our solutions often aren't grounded in the facts that would make them very useful or practical.