My grandpa gave my dad 3 articles of guidance counsel while he was alive, what do you think of this advice he gave?

1 - He said not to focus on learning everything because your time is limited, pick one thing, and ignore everything else.

2 - He said after you pick what you want to do with your life, make sure you become very good at it, because you need superior skills in a world of competition.

3 - He said to pick a career you know the economic markets will value so you can always find new jobs after you begin your job search.

My grandpa gave my dad 3 articles of guidance counsel while he was alive, what do you think of this advice he gave?
Post Opinion