Could be, but this is usually dependent on the platform you use and based on where from you get the package. Hinting, on what is missing, i guess already provides some clues, for end user to investigate further.
You are definitely right there, we all know it... It's surprisingly hard to fight that problem. We really need more ideas and thoughts on the UX side of things and small actions we can take to make to lower the learning curve (or big ones, but usually big ones bring other handfuls of problems...)
Actually, all 3D apps are hard to learn (besides sketchup or tinkercad, but you cannot do so much with them). And if you know one well, it apparently makes learning the others even harder...