I think we are missing each other on a few points but thats o.k.
The RPA has changed over the years on this issue. Not too long ago the commission was written into the agreement but was pretty much considered redundant to the listing.If I recall properly, it didn’t really matter if the section was filled out or not. Now the RPA just references the commission in a ” seperate written agreement” and the mls confirms it for the buyer’s agent. I know you know all this. It is fun to go over it.