Now, I'm pretty sure you know that, hence my confusion...
The idea that "QtCreator" is some totally independent IDE that just coincidentally happens to have the letters Qt at the beginning in the same way that Java and JavaScript are independent of one another, but otherwise has no relationship to Qt the library is just patently absurd HN pedantry.
That's only true if you intentionally ignore all the aspects where Qt Creator falls way short of what "visual studio or vim" are leaps and bounds ahead.
That's not what I was trying to say. I just thought it's worth pointing out that QtCreator is really a general-purpose C++ IDE. (It's my favourite C++ IDE, btw.)
Visual Studio is also a general-purpose C++ IDE and yet I don't think anyone would say it's independent of Windows.