Saw this post and it's a great way to accomplish this - very cool.
I don't know if it's inappropriate/allowed to mention another app in this forum (and, if this is a no no, please accept my apology and delete it immediately. But, in case it's ok, there's another tool in my toolbox that accomplishes this (and many more similar tasks/preference that fall in the same category).
I do NOT work for, or have any connection to, the app's developer - it's just a piece of software that I've used for over 10 years and would be lost without.
My favorite way of jumping to folders is dragging the folder right into the dialog box that pops up. I will either drag the folder from the path bar to jump to it in the dialog box or more frequently if I don't have the folder open I will search for it in Alfred and drag it from Alfred to the open dialog box to instantly jump to it and save the file, by far the fastest way.
In Alfred the fastest way to search for only folders is to create a file filter to search for only folders.