How is coding a fast lane venture?

I know I'm going to get slammed for this, but I'm just curious. So many threads are people rushing to learn code. But why?

I completely understand that coding is a valuable skill. But isn't it just another skill for a slowlane venture? If you spend months learning code on the side, and you start a web design business...aren't you just back to trading time for money? Is the idea to build a large design agency?

I'm sorry for the ignorance, I just don't get it.

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