Should All Engineers Become Engineers?

A paragraph to ponder from the Wall Street Journal on January 8, 2015 in an article by James Hagerty - The Life of a $140,000-a-Year Welder:

"Instead, he attended Texas State Technical College in Waco, and received a two-year degree in welding.  In 2013, his first full year as a welder, his income was about $130,000, more than triple the average annual wages for welders in the U.S.  In 2014, Mr. Friend's income rose to about $140,000."