It is irrelevant in this particular case because the script is supposed to eventually get more integrated, to become a do-something script - and then you do not

It is irrelevant in this particular case because the script is supposed to eventually get more integrated, to become a do-something script - and then you do not want to change the main function (which by then becomes an ordered list) too much, and work within the individual classes. So why not just use functions directly? Well, sometimes things are too complicated to be put in a Clean-Code-compliant function, and standardisation means less maintenance / and less rewriting if it turns out what you considered function-simple ... isn't.