"Five year plans" for my generation have a bad sound to them. They were the basis for planning in the Soviet Union and were kind of a joke in the '70's and '80's to mean "stuff that never gets done."
That said, goals aren't plans, and five years is a reasonable time-horizon for a major goal. He did a lot of things right in his use of time, including giving it a go too early, and then again getting sucked in to a startup that didn't really work out. There is nothing like seeing things fail to teach you the elements of success.
Part of that use of time should definitely be asking yourself "Am I pursuing the right goal?" as you learn more, but a fair number of people get it right.
That said, goals aren't plans, and five years is a reasonable time-horizon for a major goal. He did a lot of things right in his use of time, including giving it a go too early, and then again getting sucked in to a startup that didn't really work out. There is nothing like seeing things fail to teach you the elements of success.
Part of that use of time should definitely be asking yourself "Am I pursuing the right goal?" as you learn more, but a fair number of people get it right.