The "save some money" bracket was not intended. If you can do that, great, it will give you flexibility. But the real value is in learning deeply about non-trivial problems.

And, yes, I am saying the best preparation for worthy entrepreneurship is to do something else. Using the method outlined by the blogpost, the only problems you can solve are the problems that you encounter in your everyday life. If, however, you go (for example) to nursing school, you will learn about [a] a much larger population of problems, and [b] a population of problems that are, in many cases, grievous.

We all get one crack at life. Solving silly problems is one way to spend it. Solving real problems is another.

I agree. Coming right out of school, most people have only a little understanding of what real problems are. This was illustrated in an article a few days ago about "dudes, or duos of dudes, who have only recently experienced the crushing realization that their laundry is now their own responsibility, forever. Paradoxically, many of these dudes start companies that make laundry the central focus of their lives." https://news.ycombinator.com/item?id=7817895

I agree with you - and I understand the intent of your statement. Others may be inferring your sentiment too harshly. Like you, I am very tired of the great brainpower of the community, to solve simple/trivial problems that have a negligible impact on the world.

Measuring cups do make a difference - albeit proportionally smaller than say finding a way to remove society from fossil fuels. Measuring cup creation is much lower on the totem pole than, say relativity as examples.

I'm not sure that coming from the field is a requirement to getting good ideas(in important fields).

Being able to learn subjects deeply and communicate with subject matter experts , do in depth market studies of potential customers and creating collaborations could all be good options for creation of innovations. Hell, it works quite well for academics.