To whom is a human worth money? You can't own people, can't buy or sell them. Can't recreate them, can't even get an accurate clone.
You can talk about a sportsperson's value to their team in terms of how much money they bring in in ticket sales, how much sponsorship, how much media attention, how much another team will pay for them.
But the problem is when lots of money is involved, people care more for the money than the person. I don't have a problem with people trading on Apple stock and factoring in SJ's health at some level. I do have a problem when it pushes further and further towards SJ being treated as just another asset, some legal and medical details to be pried through, some news announcements to be analysed, some blood pressure and heart rate figures to be tracking.
Picking apart the Golden Goose to try and find where the Golden Eggs are hidden? Tearing up the Mona Lisa to find which brushstroke made it worth so much? Pulling down the Eiffel tower to see if an Operah Tower in the same place would have as much impact?
If he wasn't already a health fan, would the world be pushing him to alter his diet? His exercise regime? "In a bowel movement estimated to be worth half a million dollars this morning, SJ's saturated fat absorption levels were up 13% on last week (full analysis here), SJ didn't respond to a request for comment. Unusually, he looked in the mirror for 6% longer than average over the last three months, experts have raised concerns over his increasing vanity assessment index especially when taken into account his recent announcement "I had a great night's sleep last night" to his wife over breakfast, he didn't respond to 18 phonecalls for comment on that either". Would we be designing every part of his life and forcing him to live as we think will maximise AAPL profit, restricting and shaping like a human veal calf?
What's right with estimating somebody's worth in dollars? Why should you be able to profit from speculating on someone elses work? Why should people who have no choice where they are born be forced to be judged within the limits of someone elses monetary system?
For every million dollars the government puts into hospitals/medicare a bunch of lives are saved. There are diminishing returns, however, and at some point you have to say, okay, that's enough, let's put some money into education instead.
You have to find some kind of balance, and the more you put in education the fewer lives you can save in hospitals. The only sensible way (I can think of) to find the right balance is by crunching the numbers. Saving a life for $1000? That's only 20 text books, definitely a good deal. Saving a life for a million? That's 20 scholarships. A life isn't worth that much.
Unless you're Steve.
If Steve dies or retires, that's a risk to Apple. If he lives and works, that's a benefit. And the stock market relentlessly uses all information they can. The kind of private stuff you're talking about? That's insider trading, and that's why it's illegal for, say, Steve's doctor to short Apple stock based upon his medical examinations of Steve.
I'll get back to you ...