This echos some career advice from Dilbert creator Scott Adams. "Become very good (top 25%) at two or more things." He also goes on to say that "at least one of the skills in your mixture should involve communication, either written or verbal." The idea being that this should make it easier to leverage your other skill(s) in a work environment.

https://dilbertblog.typepad.com/the_dilbert_blog/2007/07/car...