I agree in various degrees with most of the letter, except one point I strongly disagree: compare with others.
First, comparing to others will motivate you to get better, have a positive target you want to reach: "I want to be as good as Jake" was my model when I was in college, Jake was at that time the best IT expert I met for a decade.
Second, because you need to know where you are and what is going around you. You need to know your peers and how you are qualified versus them, how productive and appreciated you are and how are you paid. You may be motivated to do something when you find the new colleague still in college is earning as much as you do after 10 years just because the company wants to promote women and "reverse the wage gap", so they give female college students positions and wages equal or higher than top rated senior engineers that are male. Just saying, I saw many such cases.
First, comparing to others will motivate you to get better, have a positive target you want to reach: "I want to be as good as Jake" was my model when I was in college, Jake was at that time the best IT expert I met for a decade.
Second, because you need to know where you are and what is going around you. You need to know your peers and how you are qualified versus them, how productive and appreciated you are and how are you paid. You may be motivated to do something when you find the new colleague still in college is earning as much as you do after 10 years just because the company wants to promote women and "reverse the wage gap", so they give female college students positions and wages equal or higher than top rated senior engineers that are male. Just saying, I saw many such cases.