The thing about satoshi is that many people took whatever he said about Bitcoin to be accurate. Many people were very interested in Bitcoin but did not understand how it would work, and looked to Satoshi for guidance. Satoshi has no reason to be in any way inaccurate about his descriptions regarding anything about Bitcoin. If Satoshi thought that no new features should be added to Bitcoin then he would have said this, and most people would have accepted this. However this is not something that he said.
On the other hand we can note that bitcoin never would have bootstrapped if it were advertised as the new gold standard (ie settlement system for banks). But all of Nash Szabo and Finney write of this.