Unless you see a Staff badge the answers you are getting are from users not Adobe employees.
You are welcome to think imposition should be done from the layout and not at output, but highend imposition tools never have and probably never will be included in InDesign. Print Booklet, as its name implies, is meant for simple desktop applications like making dummies or art books and is not intended for press impositions.
Also there are a number of problems with postscript/distilled output (flattened transparency and poor color management), and it has been abandoned by most users in favor of the more flexible and efficient PDF export.
I never thought imposition *should* be done from Indesign, and after a difficult morning yesterday, I now understand that it's rarely even a good idea!
I appreciate those who participated in this discussion, especially the extremely valuable information from the staff contributor.
My concern is (still) with Adobe support and the following "help" page: Create printer spreads for booklet printing in Adobe InDesign
This was the top result in my original search for info and of course was the one I went to. I spent a bunch of time following all the instructions. On deadline, of course. When I never was able to get an acceptable result, I thought I must be missing something or there was some trick to it and went to the Forum.
I feel that the Adobe help page should be amended with a prominent addition, such as this:
"Print booklet" is not recommended for preparing a document for commercial printing.
Many commercial printing companies include imposition in their bids and estimates at low or no cost.
These instructions are meant only for DIY printing on a desktop printer.
Best regards to all.