Im 20 and purchased a NA because of the Power/Weight laws, I could have easily got a gtst, but didn't. My skyline is a huge jump in power over my old car(which i still have btw), so i appreciate it even more.
Laws are there for a reason. Even if you dont understand why, but we all know why.
I see p plated gtstgtr as well as other High powered cars eg. V8s all the time, and i will say with experience they think they are better drivers than everyone else on the road. This is about state of mind.
I would never get something as powerful as a gtr and not have any form of safe practice in it, thats just stupid.
Public roads aren't controlled, and accidents do happen.