only someone who hasn't really used the tool in anger and mastered it would claim this. I can't even switch to eclipse from intellij and not have a huge productivity hit for several months. and that's just typing code! A real 3D modeller would have so much muscle memory for their modelling app of choice it't not funny.
I can only imagine what it would be like to switch from something that you've used a flavor of for your whole career to something entirely new, and 3D modelling for animations is way more complex than what I've ever dealt with.
Keeping it in a programming paradigm, CAD is more like assembly. It's different from platform to platform and even if you know one there's no guarantee you can make another work. Contrast that with 3d modeling packages which mostly use the same concepts, and order of operations rarely matters.
I understand why people use Blender as a CAD package a lot more now, thanks!
As someone who had a prior career in VFX using mostly Autodesk and Adobe software, there are people who spend their whole career in one of these packages and have a lot of difficulty becoming fluent in a second one.
They are designed with completely different metaphors and workflows and yes, the end result is always pixels, but learning multiple high end creative software is nothing like learning different programming languages.
Just like a programming language.
I'm sorry you're so shit at your job that switching IDEs screws you up. Not all of us are so incompetent.