old by the government to do something specific like move a patient to ICU
The Government do not tell doctors to move people to ICU. It is the last place anyone wants anyone to be because of the cost and the infection risk both being elevated.
I have been in intensive care and not need ventilation or oxygen - I scared the crap out of a nurse because I got out of my bed and walked to the staff loo at one point - I was there was there was a serious chance I may need to have an emergency ventilation and previous experience had demonstrated that this is not an easy procedure to do on me.
I left 48 hours later, with no oxygen since I had left A and E, had been talking and eating food throughout.
ICU can and is used as a "just to be safe" option too - it always has been.