I have stated that there are good reasons for having the complete rulebook at the table to support the GM. Does anyone disagree with this? Just trying to find common ground, if any...
There are some reasons why the entire book would be a good thing to have. However, the current additional resources rules don't require it:
n order to utilize content from an Additional Resource, a player must have a physical copy of the Additional Resource in question, a name-watermarked Paizo PDF of it, or a printout of the relevant pages from it, as well as a copy of the current version of the Additional Resources list
I think we can agree that the only difference between a printout of the relevant pages of a watermarked Paizo PDF and a photocopy of the relevant pages of a Paizo book is the possible ambiguity in ownership.