I feel like Python bindings came along kicking and screaming by the Qt owners. PyQt was originally developed and licensed independently. Nokia was negotiating a relicensing with Riverbank Software. When that broke down and they wrote PySide--basically a reimplementation. That was kind of abandoned with Python 3 and Qt5 until the VFX industry made a big push for PySide2 (rebranded Qt for Python).

Even with all of that, you generally end up reading the C++ docs, it isn't particularly Pythonic, and there are weird gotchas. I can't really fault them for it because you're bound to get that with bindings to another language and it is much better than other UI toolkits.