When you say "IDE" you're probably meaning something like Visual Studio. Ok, fair enough.

Now think about something like HyperCard. That's an IDE. It's eminently usable and learnable (even friendly), and yet still does all the things an IDE does.

"IDE" doesn't have to be Visual Studio. There have been friendly IDEs in the past, and there's no reason they couldn't be built today except nobody's doing it. There's actually a nasty trend in software development right now that can be summarized as "they're programmers; they don't need usability or discoverability". Look at Git for an example. Ugh. This trend can not die quickly enough for me.