For perspective - July 2026: 24.9%, All-time low (june 2023): 22.3%, 2008 Financial Crisis Peak: 34.8%, Covid Peak: 34.2%
The metrics are not reflecting reality, while being used to justify not using aggressive intervention to improve.
But I suspect that Krugman's point (even if he expressed it badly) is that food, energy, and fuel are more noisy - more seasonal, but also have more noise in other ways. Well, if you want an early warning of which direction the economy is going, you don't want the noise, because if you mistake it for signal, you're going to be misled. So an economist may well find such a number more useful.