All of you miss one thing. Higher PT req, less accurate your weapon is.
I mean: wpf at all doesnt increase accuracy highly enough, to make a thrower with 150+ wpf. 100 is enough.
But if you have high PT, your accuracy is REALLY GOOD. Even WITHOUT wpf. If you dont have any wpf (1) in throwing, but 9PT, you can see, that rocks are the most accurate throwing weapon at this point, and wardarts are a bit less accurate. If you take alook at javelins, they are SO inaccurate... but hey, Jarids are even less accurate. Why? Now take a look at req. Higher req = less accurate, because PT is increasing accuracy only if higher than req.
So stones with 0 req will gain accuracy from 1pt, 2pt, 3pt, ... 14pt. But for instance javelins with its 3req, will gain accuracy from 4pt, 5pt, ... 14pt.
And Lances with 7 req will gain accuracy from 8pt, 9pt, 10pt, 11pt, 12pt, 13pt, 14pt.
If you increase req of throwing weapons, you kill their accuracy.