I understand. Human is a great plug-in with many years of experience behind it and I would argue that soon it should be incorporated to grasshopper because it’s great.
In programming in general, libraries or plugins as we call it here are a fundamental part that allows software developers to provide a fast reliable version of its program without any extra weight. If you need some particular library in any programming language you just have to go and import it to your project. That is the way that programming languages work. What McNeel is doing here it’s nothing odd or new. I think it’s great that grasshopper has such a level of open-source design that any developer can create a plug in that feed their needs and share it with the world.
Personally as an architect I never ever never needed to display a line in rendered mode, I would just bake the stuff, so for me yor request is really odd. It is great that there is someone out there that had the same problem and created a plugin for it.
Grasshopper today is used in A LOT of industries, like architecture, jewelery design, engineering, digital art and so many others. If the software had each and every function that every user needs, it would be a disaster. Very heavy, lots of memory usage, lot of useless functions for every user.
I hope you get the point.
Maybe you should rename the topic as REQUEST to avoid further confussions.