Can make a lot more means nothing if you don't look at the distribution. According to Payscale[1] more than 90% of welders make less than $26/hour. I'm sure that there exists some welders that make 6 figures but 9/10 out of them don't come within a mile of that.

1. https://www.payscale.com/research/US/Job=Welder/Hourly_Rate