9mm twist question

I've pondered the reason why early 9mm's such as the Luger P 08 and others had really fast twists and the only thing I could come up with is maybe it was needed to help fully function the pistol.  Let me explain.  Really fast twist create more friction thus more pressure.  Maybe with the powders they had in the beginning of semi-automatics wasn't up to snuff like today's propellants.  You all know to that the P 08 Luger requires some potent 9mm ammo to function properly.

Now on the accuracy, if you have a good gunsmith build a full out target model on the 1911 it's every bit as accurate as it's 45 acp counterpart.  I've build some really accurate 1911 9mm's and also some 38 Supers.  Supers weren't particularly accurate in it's early days because it head spaced on the rim at the back of the barrel hood on the 1911's.  That's since changed.  A savvy reloader woulld know to load his bullet out further (especially with cast) to let it head space with the bullet bumping up again the leade.   I have a really old 9mm P 08 Luger that will shoot 1/2 inch groups at 25 yards with cast.  Lugers are very accurate pistols.