What is required to attain a particular position may be very different from what is required to succeed in that position. Fail in either category and you'll fail.
Period. End of sentence.
That may not be fair but - let's all shout it together - life is unfair.
What is helpful is to know which game you are in. It will be helpful if you can acquire skills in the first stage that can be used in the second. If all you do is succeed in the first stage while giving little serious thought to the second, then disaster may await.
The learning curve is very steep in the second stage. That's a cruel twist because those who devote early preparation for the second stage risk weakening the skills needed to emerge from the first.
Know which game you are in but don't forget which game is ahead.