If you don't understand some basic low level programming, you will struggle to make non-trivial performant code with higher level languages.
If you don't understand how to make vanilla web pages, you will struggle to make non-trivial good web applications with frameworks.
If you don't understand how to code, you will struggle to make non-trivial good software with AI.
All of these phrases are still true to this day. If you don't understand the things behind the abstractions you are using, you will always be limited in how fast/good your results will be. Yes, your React web page may work even though you wouldn't know how to make the same thing without React, but it probably sucks very hard.