It makes things simpler.
Currently when pamac builds AUR packages you have the work going on in a terminal window embedded in a tab withing pamac.
This invariably asks you a series of Y/N questions and then asks for your password (which you already provided to start the pamac update).
The Y/N questions starts out with one you wold normally answer N to (Do you want to edit the package build), and all the rest are usually Y.
Joe Enduser really will never edit the package build. (Joe Hacker might).
All of that can go away for normal everyday users. This makes AUR packages easier to handle for normal users.
(Most normal users don't need AUR anyway. So its not a huge deal, but often there are just a few packages that you want which are not in Manjaro Repositories. However, there occasionally happens accidents where packages are deleted from Manjaro, for various reasons, which can be automatically fetched from AUR [a mixed blessing], and this will make that easier instead of removing software the user might want.