There's not much to elaborate on; the argument literally makes no sense as presented. You say "wealth is better thought-of as a measure of how many jobs the owner of a company could have created, but didn't." It isn't.

Apple has $100b in cash. Are you going to seriously tell me that if Apple gives $10b back to shareholders via a dividend that, regardless of what those shareholders do with the money, total employment for the economy as a whole will be lower? And that, further, if those shareholders had never invested in Apple at all total employment for the economy would be the same? In other words, that dividends from an alternate-world Apple would not both be a sign that the possessor had created jobs in the past, as well as a potent mechanism with which to create jobs in the future? Because, that's exactly what you're saying, and there isn't an iota of evidence in your favour.

Or to take another tack, the internet has been all atwitter about asteroid mining recently, funded by, among others, Larry Page and Eric Schmidt. You're going to sit here and say that it's clearly the case that, if we care about unemployment, the money they're sinking into the venture should have stayed with Google. That, somehow, if Google had decided to go into asteroid mining, rather than the founders of Google, it will magically create more jobs? Because...what? Again, there is no theoretical basis or empirical evidence for this notion.

I could go on forever. Your argument is lunacy on its face, and when we unpack it, it is based on levels of misunderstanding and mistakes all the way down. I'm sorry, but if you want more than a contemptuous flame, you're going to need to do better.