Agreed. The measurement is the theoretical duct tape between the "quantum world" and the "classical world". But there is no such thing as a "classical world",

Agreed. The measurement is the theoretical duct tape between the "quantum world" and the "classical world". But there is no such thing as a "classical world", it's just a useful approximation. And therefore, there is also no such thing as a "measurement", it's also an approximation. (Maybe not even an approximation, but maybe more like a projection...)