It doesn’t make his point.
The mortality rate of regular flu is about 0.1%. The mortality of coronavirus is conservatively 1% and potentially as high as 3.5%, so at least 10 times more deadly.
Also, the NHS is geared up to deal with the regular flu and can quite accurately predict the numbers and it has enough capacity to cope.
With coronavirus, it’s spreading so quickly that the major problem is the NHS does not have the capacity to deal with all of those people all at the same time.
There are only a finite amount of beds, so when they are all taken up the doctors are going to have to make decisions on who gets treated - the elderly coronavirus patient or the kid who’s got leukaemia.
The idea of Social Distancing isn’t to protect yourself from getting it if you’re fit and healthy. It’s to slow down the rate at which this spreads so that the NHS doesn’t collapse because it can’t cope with the volume of people all at one time.