Most of what you just said about Word (tooltips, keyboard shortcuts, icons, programming environment) is also true of Blender.
But I don't really know what the equivalent of "just type some text" would be in Blender.
Blender has the shortcuts and programming environment, but lacked the icons/tooltips in many cases. Many existing tooltips listed only what the button mapped to in the python environment.
Looking at Blender 2.79 right now, a comfortable 90% of icons, buttons etc have tooltips with useful (if terse) text. Some buttons are text instead of icons, but that's also true of Word.
I don't doubt Word is more discoverable, partly because of Microsoft's resources and partly because word processing is fundamentally more accessible than 3D modelling. But by the metrics you're talking about, Blender is maybe 75-90% as good. Which I don't think is the same as "discoverability almost doesn't exist".
> word processing is fundamentally more accessible than 3D modelling.
I'd strongly dispute the "fundamentally" part, though this may only be obvious when using a VR-native 3D modelling program rather than a desktop one.
a text processor's complexity can't even begin to be compared to a modern 3d package's, I've used a lot of them and they always suffer from discoverability issues.
I often wish there was a wider range of 3d programs that did only one thing and did it well, instead of these monolithic beasts doing poly modeling, nurbs, sculpting, texturing, animation, lighting, rigging, physics simulations, rendering etc etc etc etc etc etc all in one, but for the most part the whole process is too tightly coupled, and it seems when you manage to extract one piece out you (eg sculpting with z brush) you end up adding extra complexity on top. you can fill the screen with tool tips as much as you want, it's still going to be hard to navigate.
You don't have to choose one or the other, it just takes time to make it right for both.
Word is a good example example. You want to type some text? It's easy. You want to format it? Click the icons that look relevant. You do it often? Keyboard shortcuts are available for everything. You want to do typesetting? Styles are available, but not enforced. You want to automate things? Integrated programming environment is waiting for you. And almost every action has its own page in the manual.
Simple things are simple, tooltips and icons provide discoverability, and you can head to the manual for expert content.
This is totally not how blender pre-2.8 works where the discoverability almost doesn't exist.