Ah, but the whole point is that if a checklist is not used, or used improperly (like an interruption), the underlying pilot discipline must be to assure configuration for the intended phase of flight.
I've seen pilots whistle through a checklist, without actually checking the item - I've caught them at it! Silly, for certain, but if you're flying on your own, and do that, the discipline of configuration assurance could save the day.
We get fixated with the checklist, and it varies by aircraft type. Sometimes there is not a correct checklist anyway.
The need to assure configuration is always constant - no matter what aircraft type, or checklist format. I'm not knocking checklists, but I assure configuration as a separate exercise.