Labaik, you really are very alarmist, but offer no evidence for anything beyond saying you think it.
The vast majority of people on ventilation are over 70s because, generally, people under that age are unlikely to have the virus so severely they need one. The death rate for children seems to be under 1% for over 80s and those with underlying health conditions up to 15%. The competition for ventilators will not be between young and old but between the old do you, who has asthma and high blood pressure get the ventilator or the person in the next bed, 5 years your junior but with asthma, diabetes, and high blood pressure.