To add another counterexample into the mix, I’ve met many artists and designers who are proficient with Unreal Engine’s Blueprint with no C++ experience. Some have even shipped games made entirely in blueprint with no traditional code.
[1]: https://web.archive.org/web/20160821143752/http://nifflas.ni...
Previously: https://blueprintsfromhell.tumblr.com/
"Confessions of a unreal engine 4 engineering firefighter": https://news.ycombinator.com/item?id=16775166