DivideAlongCreases Explanation

Over the years people here have suggested using the divide along creases command to solve problems.I was working on something tonight that was not coming out correctly. I tried DivideAlongCreases and I got the results I was expecting.

I can see what dividealongcreases does but what creates a need to use it. If seems, for example, that lofting likes to create things without creases.

I was wondering if someone could explain why DivideALongCreases is needed and what creates the need.