That sort of talk represents the natural position of Johnson and his ilk.
However in this case it sounds like that bit was a setup to juxtapose against a rather different sentiment expressed with the next thing he said. Lets see it in that context:
From Guardian live politics updates page earlier, which also featured this:
Rolling coverage of the day’s political developments as they happened, including the Commons health committee questioning Prof Chris Whitty, the chief medical officer
www.theguardian.com
And this:
I'm not really looking forward to the moment where people who dont fit the 'elderly' label die and cause an adjustment to the sentiment expressed in brackets near the end there. Well I mean obviously I think that sentiment needs adjusting, the bit I'm not looking forward to is the deaths and the more nuanced reality dawning on people.