Okay, I'll begin my rant, by suggesting that it doesn't have 95 reach, as it has a hitbox that extends well past the tip.
wat... umm... That's like saying you don't believe the danish does 40 base cut damage. The length has nothing to do with the model, it's purely based on the stat, therefore whatever the stat says the length is, that's the length. You could theoretically put 120 length on a dagger, and it would have 120 length, just a bunch of ghost reach.
You also seem to massively overestimate how much wpf actually does. Check the calculator: 40 cut with 3 PS and 189 wpf (I'm doing these calculations assuming no armor, which of course is a rare occurence) on 45 body armor is average 22 damage. MW danish, 43 cut with let's say a somewhat balanced build so 24/15 with 8 PS and 111 wm (assuming no weaponmaster, or just a nasty reduction from using armor), = 32.5 average damage on 45 body armor.
So, in this scenario the danish does almost 50% more damage on a target with medium armor. Yes, the katana is fast, but it's also damn short and can't hit nearly as hard. Not to mention that in order to use it effectively you need to make a build and gear setup that will, as others have said before, get 1 shot by most people, whereas the katana wielder will need to hit around 3-4 times even against medium armor, assuming average hits.