The Mountain Rating is actually a restriction of your privileges.
No, it isn't.
You appear to think that NPPL holders need a Class 2 Medical. They don't.
You appear to think that, if the enroute weather is fine, you can set out for your destination. Not so.
Sorry, Brendan, but your case is riddled with inaccuracies, misunderstandings and plain nonsense. You have destroyed your case yourself.