That was absolutely clear from the beginning. It is just physics and chemistry. If you have problem not with the breathing process but with gas exchange in lungs there are no any way artificial breathing AKA intubation could somehow help. It absolutely does not matter how you fill and discharge lungs with air, artificially or in natural way if something prevent normal gas exchange. Intubation was never used for pneumonia. To resolve gas exchange problem you need to change oxygen amount for one breath, by rising ambient pressure or adding oxygen to breathing air, not force breathing artificially. You need an intubation only when a person somehow lost an ability to physically breath - for some problem with nerve signals to lung muscules or damage of breathing muscules, something like that. If a person could perfectly breath himself, using intubation is not only useless, but also extremely harmful due to so many reasons.

That idiocy / intended harm was so obvious and on the surface, that I still don't understand why so many people just eat that ventilator bullshit without any questions. Seems that nobody cared about learning physics and chemistry in school or think that physics and chemistry does not apply for medicine.