The thing is that it also depends a LOT of how your life turns out later, which is hard to predict.
I did Latin because my dad didn't and regretted it immensely when he took up Pharmacy, since he felt he would have had an easier time learning latin names. It's both arguably wrong (it's not because you can translate Cicero that you can remember plant names) and very narrow. It however served me immensely in vocabulary parsing, both in French, my native language, and English, heavily influenced by it.
You mention interesting gaps, like nutrition or fitness, finance and general life knowledge, which I felt I lacked too. I had to suffer through a lot of these when emigrating to Asia but I survived. I suppose I'd be like my dad and force my kid now to learn how to setup life in a new country completely alone if it was a school subject :D But my kid could decide to become a local farmer and write on FarmerNews how useless it all was and how he wishes there were more classes about agricultural science.
The way I see it is that education is also a way to create well-rounded citizens able to take semi-coherent decisions at the voting booth (so Geography and History, Philosophy and Literature are useful here), a long and hard problem we've had for centuries. Beyond that, we have had a big debate in France since forever between school being "education" or "instruction": shouldn't parents be put on the hook for their children's survival rather than our taxes paying for everyone's ability to compete equally ? Do we educate children to the point we teach them to wipe their asses and eat properly, or do we "instruct" them solely on theoretical and moral subjects, leaving the base survival skill to the family ? School, many say in France, shouldn't shoulder all responsibilities in a person's "education".
In Asia, or let's say China since that's where I am, education is very mechanical and a pure transfer of practical knowledge in a narrow set of easy subject like Physics or Maths, or Chinese. There is no hint (or it's being discussed to remove them in some places) of opinion building, critical thinking, history-as-a-science or things like that. They would do fitness or eating classes if they realize it's becoming a problem, in a way that would probably serve kids. But, end of the day, they see humans as cattle and as every farmer, like their cattle so long as they do what they're designed to do. No way they read Cicero, ever :)