@stoneMason-- I'm not an expert on this topic but I'm sure that hospitals do clean and sanitize ventilators and tubes regularly. I think many people with ventilator associated pneumonia get the bacteria in the hospital or during surgery. The ventilator may worsen things by giving the bacteria a good environment to multiply and infect the patient. So the ventilator isn't necessarily the root cause of the problem. It just makes it easier for pneumonia bacteria to survive and thrive.
Unfortunately, hospitals, no matter how hard they work to keep bacteria and viruses away do hold a variety of microorganisms because of the patients. And people who have weak immune systems due to illness develop infections like pneumonia very easily. So I wouldn't blame hospitals or doctors about this kind of pneumonia. But it is their responsibility to monitor the patient for signs of infections such as this and have it treated as soon as possible.