That's why we did a research work about the industry in the WWII timelapse in order to translate it into a mod. We don't agree with this view and want rather to play in a situation with historical settings concerning the relative power of each countries.
For the HOI4 devs team, each minor country should be 'playable', the Axis should have a chance to 'win', global conquest should be a possible achievment. In vanilla, industry is balanced around 'playability' and not around History. The primary objective of our work was to 'correct' the industrial balance in the game :