Qt license is pretty ok, it is just complicated for the typical crowd that wants to sell stuff built with free (beer) tools.
I guess the proper rephrasing is that it doesn't match the licensing terms of most projects in the Python world.
It's most definitely not the most complicated thing, but when your processes are based off of BSD'd libraries, you gotta think a bit harder about Qt usage, if only for it falling outside the normal scope of things.
Isn't the licensing LGPL3? How is this confusing?
To be honest most of the QT solutions for Python are pretty fidgety . The recent wxPython releases (4.x) work out of the box direct from PyPI, not too much to worry about licensing.
For Qt, it's... the licensing is usually just fine for people but it's complex enough to where things like maintaining your own fork (pretty easy in Python compared to C++) is not super easy. But there's decent Python support, so it's more "do you want to use Qt or wx". Both systems have good enough support.