SageU training and Posting from Preview

We consistently promote Paperless Office for journals and registers as important (free) records to create during posting, recommending that the ability to post from Preview be disabled for all user Roles.

However, in the SageU training videos, when posting journals and registers, Paperless is ignored with all example postings being updated from a Preview, (presenting this as a normal business process to users), which seems counter-productive.  Why create instruction videos which ignore Paperless?