That's because you are used to it. I am old enough to have been there during the rise of things like intellisense and language servers, people were making the exact same arguments about them. That not knowing your API to the core makes you a bad programmer. I'm sure for IDEs themselves there were similar arguments and it goes all the way back to Socrates' warning against writing. These arguments always end with "but this time it's different". And inevitably each time it's not.