I can't say I agree. That would be a good idea in a world where users never encountered errors in normal circumstances, but in fact computers don't work very well and users encounter errors on a regular basis. Using computers is a skill. It takes study. You can either pretend that it doesn't, giving users something underpowered that is going to break anyway, or acknowledge that computers are complicated, and build tools and resources to help users navigate them. And users should recognize it as folly to try to use the most complicated tools on the planet today without any understanding of how they work.
This doesn't really apply to HTTP status codes. They're largely useless. It does apply to the way my Macintosh told me of a misconfiguration after I reinstalled the operating system. Somehow the people at Apple thought an error code and a brief description would be scary, so they opted for this absolutely terrifying icon instead:
https://i.stack.imgur.com/Y1teY.jpg
(Not my picture, by the way.)