You know all kinds of things can happen during a PhD right? Many don't even make it to the end, some get burnt out and leave without a degree (along with their career prospects), some meet abusive professors, some find themselves in illness (bonus points if you are in America, don't know wtf is happening with their healthcare system), some find their advisor suddenly leave academia and their lab fucking disappears (which I have experienced), etc.
Anyways, I think planning decades into the future to get what you want with a spreadsheet is only possible from a petit-bourgeois "middle-class" standpoint. From David Graeber's paper "Anthropology and the rise of the professional-managerial class" [0], he talks about what that mentality is:
> What being middle class means, first and foremost, is a feeling that the fundamental social institutions that surround one—whether police, schools, social service offices, or financial institutions—ultimately exist for your benefit. That the rules exist for people like yourself, and if you play by them correctly, you should be able to reasonably predict the results. This is what allows middle-class people to plot careers, even for their children, to feel they can project themselves forward in time, with the assumption that the rules will always remain the same, that there is a social ground under their feet. (This is obviously much less true either for the upper classes, who see themselves as existing in history, which is always changing, or the poor, who rarely have much control over their life situation.)
And guess what, that middle class is shrinking (since the things that welfare capitalism has promised are starting to not be true anymore, like if you work hard enough you can buy a house and start a family...) Many people in first-world countries have already been woken out from that fantasy.
I think we are talking past each other. I agree that life is volatile. And it is very lucky to be able to even plan a few years into the future.
But I do not think Graeber's quote is applicable here. The exercise of planning future cash flow can help you increase the quality of the bets you place (and/or adjust your expectations). Singular choices have no guaranteed results, but the sum total of choices can be influenced by gathering information about the world and keeping your models updated, allowing you to make choices where the odds are more favorable to you.
Anyways, I think planning decades into the future to get what you want with a spreadsheet is only possible from a petit-bourgeois "middle-class" standpoint. From David Graeber's paper "Anthropology and the rise of the professional-managerial class" [0], he talks about what that mentality is:
> What being middle class means, first and foremost, is a feeling that the fundamental social institutions that surround one—whether police, schools, social service offices, or financial institutions—ultimately exist for your benefit. That the rules exist for people like yourself, and if you play by them correctly, you should be able to reasonably predict the results. This is what allows middle-class people to plot careers, even for their children, to feel they can project themselves forward in time, with the assumption that the rules will always remain the same, that there is a social ground under their feet. (This is obviously much less true either for the upper classes, who see themselves as existing in history, which is always changing, or the poor, who rarely have much control over their life situation.)
And guess what, that middle class is shrinking (since the things that welfare capitalism has promised are starting to not be true anymore, like if you work hard enough you can buy a house and start a family...) Many people in first-world countries have already been woken out from that fantasy.
[0] https://www.journals.uchicago.edu/doi/pdfplus/10.14318/hau4....