I'm not entirely sure what this plugin does... because anybody with half a brain can put relationships in a game with this plugin... (Not to mention you have to pay for it)
What does it even do???
I guess you meant "without this plugin"?
Anyway, the premium version adds the possibility to create a separate menu where the dev can add up to 5 tabs (interchangeable, so potentially limitless) where you can create informations (generally Factions, Relationships and Traits but really anything you want) by assembling them how you want.
I added the possibility to use face sets, characters, icons or pictures for graphics, I added the possibility to show text dynamically as switches gets turned on and a progression bar display
Point 1: Those are things that a lot of people can't do as it's required JS knowledge,
Point 2: This is a plugin as any other plugin adds a ready to use feature
Please refrain in the future from using terms as "anybody with half a brain" because any developer has its own area of expertise and there are people who do not want to handle it with the eventing, if you are able of doing it, good for you, but that doesn't put you in a better position than others.