Exactly, calibration is done after the nozzle cleaning. I didn’t say that having the nozzle clean wasn’t important. However, the nozzle cleaning step is to insure that it is clean BEFORE the calibration. Other than cleaning the nozzle of any debris, I still maintain that the nozzle cleaning itself isn’t part of the calibration, it’s just preparing for the calibration.
FWIW, there are printable nozzle cleaning brushes that you can print using TPC if you’re so inclined. I saw them, but so far I haven’t invested in any plate that doesn’t have the brush, I just have the Creality A and B plates. So far I haven’t needed anything else.