Perhaps because the most popular comment at the very beginning of the request includes "collapsible sections" and that likely influences people.. it is why I voted that up. I don't spend lots of time here, and google sent me to that page, I agreed and voted it up in part because of the "collapsible sections" comment by one of the other "Gurus". So, perhaps the Evernote team are not getting an accurate measure of the interest regarding this collapse feature... because some are voting for it on that thread, as much as they are bookmarks, rather than this thread.
I understand it isn't part of the original request, but obviously now it is prominent, and part of what people are noticing... at least it was for me and I might not be the only one. I have always been interested in both features. At first glance that thread seemed to reinforce my desire for both features. I don't spend time here browsing through everything and making sure there isn't crossover.. maybe some moderators should do that.