I sit somewhere tangential on this - I think Bret Victor's thoughts are valid here, or my interpretation of them - that we need to start revisiting our tooling. Our IDEs should be doing a lot more heavy lifting to suit our needs and reduce the amount of cognitive load that's better suited for the computer anyways. I get it's not as valid here as other use cases, but there's some room for improvements.

Having it in separate functions is more testable and maintainable and more readable when we're thinking about control flow. Sometimes we want to look at a function and understand the nuts and bolts and sometimes we just want to know the overall flow. Why can't we swap between views and inline the functions in our IDE when we want to see the full flow? In fact, why can't we see the function inline but with the parameter variables replaced by passed values to get a feel for how the function will flow and compute what can be easily computed (assuming no global state)?

I could be completely off base, but more and more recently - especially after years of teaching introductory programming - I'm leaning more toward the idea that our IDEs should be doubling down on taking advantage of language features, live computation, and co-operating with our coding style... and not just OOP. I'd love to hear some places that I might be overlooking. Maybe this is all a moot point, but I think code design and tooling should go hand in hand.