A smaller chunk that no one else calls should just be included. The break up is actually hurting undertsanding and maintainability.

Except the only real rule is that rules are wrong.

All there are is different and actually contradictory pressures for different and actually contradictory priorities that are all true and valid at the same time even though many contrdict. The correct thing in each given moment is whatever makes the shortest rubber band lines between all priorities.

Sometimes that will be a very large single function even if some other times that will be a bunch of 10 liners.