No one succeeds in making accurate predictions of the future over a 40 year time scale. Look back at the 20th century, and see the range of range of events, and the kind of technological change, that could occur in a span that long.

Go into things expecting you might have to change careers.

> No one succeeds in making accurate predictions of the future over a 40 year time scale.

The sports analogy holds; the future location of the ball may be uncertain, but that is the student's target, and not overcommitting to the present location of the ball. The commenter is expressing disappointment that the commentary seems to be reacting to the present too much.

> accurate predictions of the future over a 40 year time scale

I think the problem is the reverse. We no longer can make good predictions for four years ahead, certainly not eight.

And yet, people have to make choices - so they need advice and some kind of hope of a guess.

> you might have to change careers.

I hope this is some dust dry humor!