> the difference is "i see this information at a glance" versus "i need to move the cursor to each unknown name to ask my ide a question".

Is it really "at a glance"?

In most languages either by convention or requirement the "import" or "using" statements are collected at the beginning of a file. Once you've scrolled down even a few lines, the context is gone.

Also, determining what exactly is bound where is decidedly non-trivial in many languages due to keywords such as "var" and "let", overloaded function/method definitions, etc...

Sure, a human can do this with 95% or better accuracy, but that 5% can be a killer during a complex troubleshooting session if you guess wrong.

That's why I strongly prefer IDEs and having a purely mechanical process to resolve the dependencies so I can know exactly what things are instead of hoping my intuitions were correct.