I've been practicing Infectious Diseases medicine for 41 years. That's 42 "flu seasons".
In peak flu season, the average number of patients in my practice with hypoxemic respiratory failure requiring a ventilator on any given day is 0-1. For the three weeks before, during, and after 1/15/22, those numbers were 12, 19, and 14.
Believe what you want, 19 ventilated and contagious patients are enough to leave a memory on staff for years.