Agreed. This is the basis of open source software and creative commons work. Ideas don't spring forth from a vacuum. Ideas are the result of a cultural experience, i.e., there are no lone inventors.
While I can agree with the point about copying without attribution, I disagree that copying an idea is inherently bad. Notice how 900+ cryptocurrencies came around after the first one, Bitcoin. Every successor offers an improvement on the original, some starting with original Bitcoin code with improvements.
The key difference there is that the successful ones make improvements. There's also a million tokens out there that didn't make any improvements or come up with any better use cases and are pretty much worthless. I'm specifically referring to people attempting to copy something and not even understanding what they were trying to copy.